diff --git a/packages/core/src/debug/debug_node.ts b/packages/core/src/debug/debug_node.ts
index ac2b3a05a0..09580ffbcd 100644
--- a/packages/core/src/debug/debug_node.ts
+++ b/packages/core/src/debug/debug_node.ts
@@ -11,16 +11,19 @@ import {getViewComponent} from '../render3/global_utils_api';
 import {CONTAINER_HEADER_OFFSET, LContainer, NATIVE} from '../render3/interfaces/container';
 import {TElementNode, TNode, TNodeFlags, TNodeType} from '../render3/interfaces/node';
 import {StylingIndex} from '../render3/interfaces/styling';
+import {isComponent, isLContainer} from '../render3/interfaces/type_checks';
 import {LView, PARENT, TData, TVIEW, T_HOST} from '../render3/interfaces/view';
 import {getProp, getValue, isClassBasedValue} from '../render3/styling/class_and_style_bindings';
 import {getStylingContextFromLView} from '../render3/styling/util';
 import {getComponent, getContext, getInjectionTokens, getInjector, getListeners, getLocalRefs, isBrowserEvents, loadLContext, loadLContextFromNode} from '../render3/util/discovery_utils';
 import {INTERPOLATION_DELIMITER, isPropMetadataString, renderStringify} from '../render3/util/misc_utils';
 import {findComponentView} from '../render3/util/view_traversal_utils';
-import {getComponentViewByIndex, getNativeByTNodeOrNull, isComponent, isLContainer} from '../render3/util/view_utils';
+import {getComponentViewByIndex, getNativeByTNodeOrNull} from '../render3/util/view_utils';
 import {assertDomNode} from '../util/assert';
 import {DebugContext} from '../view/index';
 
+
+
 /**
  * @publicApi
  */
diff --git a/packages/core/src/render3/assert.ts b/packages/core/src/render3/assert.ts
index 8f1e59eb1c..18a44d0e29 100644
--- a/packages/core/src/render3/assert.ts
+++ b/packages/core/src/render3/assert.ts
@@ -10,8 +10,8 @@ import {assertDefined, assertEqual, throwError} from '../util/assert';
 
 import {getComponentDef, getNgModuleDef} from './definition';
 import {TNode} from './interfaces/node';
+import {isLContainer, isLView} from './interfaces/type_checks';
 import {LView, TVIEW, TView} from './interfaces/view';
-import {isLContainer, isLView} from './util/view_utils';
 
 export function assertTNodeForLView(tNode: TNode, lView: LView) {
   tNode.hasOwnProperty('tView_') && assertEqual(
diff --git a/packages/core/src/render3/di.ts b/packages/core/src/render3/di.ts
index d5a1a2ef51..ea28825677 100644
--- a/packages/core/src/render3/di.ts
+++ b/packages/core/src/render3/di.ts
@@ -18,6 +18,7 @@ import {NG_ELEMENT_ID} from './fields';
 import {DirectiveDef, FactoryFn} from './interfaces/definition';
 import {NO_PARENT_INJECTOR, NodeInjectorFactory, PARENT_INJECTOR, RelativeInjectorLocation, RelativeInjectorLocationFlags, TNODE, isFactory} from './interfaces/injector';
 import {AttributeMarker, TContainerNode, TElementContainerNode, TElementNode, TNode, TNodeFlags, TNodeProviderIndexes, TNodeType} from './interfaces/node';
+import {isComponent, isComponentDef} from './interfaces/type_checks';
 import {DECLARATION_VIEW, INJECTOR, LView, TData, TVIEW, TView, T_HOST} from './interfaces/view';
 import {assertNodeOfPossibleTypes} from './node_assert';
 import {getLView, getPreviousOrParentTNode, setTNodeAndViewData} from './state';
@@ -25,7 +26,6 @@ import {isNameOnlyAttributeMarker} from './util/attrs_utils';
 import {getParentInjectorIndex, getParentInjectorView, hasParentInjector} from './util/injector_utils';
 import {stringifyForError} from './util/misc_utils';
 import {findComponentView} from './util/view_traversal_utils';
-import {isComponent, isComponentDef} from './util/view_utils';
 
 
 
diff --git a/packages/core/src/render3/di_setup.ts b/packages/core/src/render3/di_setup.ts
index f0b7ef43b8..7540090cba 100644
--- a/packages/core/src/render3/di_setup.ts
+++ b/packages/core/src/render3/di_setup.ts
@@ -16,9 +16,9 @@ import {ɵɵdirectiveInject} from './instructions/all';
 import {DirectiveDef} from './interfaces/definition';
 import {NodeInjectorFactory} from './interfaces/injector';
 import {TContainerNode, TElementContainerNode, TElementNode, TNodeProviderIndexes} from './interfaces/node';
+import {isComponentDef} from './interfaces/type_checks';
 import {LView, TData, TVIEW, TView} from './interfaces/view';
 import {getLView, getPreviousOrParentTNode} from './state';
-import {isComponentDef} from './util/view_utils';
 
 
 
diff --git a/packages/core/src/render3/features/inherit_definition_feature.ts b/packages/core/src/render3/features/inherit_definition_feature.ts
index 441af1e386..4d32bfdf12 100644
--- a/packages/core/src/render3/features/inherit_definition_feature.ts
+++ b/packages/core/src/render3/features/inherit_definition_feature.ts
@@ -10,8 +10,8 @@ import {Type} from '../../interface/type';
 import {fillProperties} from '../../util/property';
 import {EMPTY_ARRAY, EMPTY_OBJ} from '../empty';
 import {ComponentDef, ContentQueriesFunction, DirectiveDef, DirectiveDefFeature, HostBindingsFunction, RenderFlags, ViewQueriesFunction} from '../interfaces/definition';
+import {isComponentDef} from '../interfaces/type_checks';
 import {adjustActiveDirectiveSuperClassDepthPosition} from '../state';
-import {isComponentDef} from '../util/view_utils';
 
 import {ɵɵNgOnChangesFeature} from './ng_onchanges_feature';
 
diff --git a/packages/core/src/render3/i18n.ts b/packages/core/src/render3/i18n.ts
index 2a328885b3..70fa75d728 100644
--- a/packages/core/src/render3/i18n.ts
+++ b/packages/core/src/render3/i18n.ts
@@ -25,13 +25,14 @@ import {TElementNode, TIcuContainerNode, TNode, TNodeFlags, TNodeType, TProjecti
 import {RComment, RElement, RText} from './interfaces/renderer';
 import {SanitizerFn} from './interfaces/sanitization';
 import {StylingContext} from './interfaces/styling';
+import {isLContainer} from './interfaces/type_checks';
 import {BINDING_INDEX, HEADER_OFFSET, LView, RENDERER, TVIEW, TView, T_HOST} from './interfaces/view';
 import {appendChild, appendProjectedNodes, createTextNode, nativeRemoveNode} from './node_manipulation';
 import {getIsParent, getLView, getPreviousOrParentTNode, setIsNotParent, setPreviousOrParentTNode} from './state';
 import {NO_CHANGE} from './tokens';
 import {renderStringify} from './util/misc_utils';
 import {findComponentView} from './util/view_traversal_utils';
-import {getNativeByIndex, getNativeByTNode, getTNode, isLContainer} from './util/view_utils';
+import {getNativeByIndex, getNativeByTNode, getTNode} from './util/view_utils';
 
 
 const MARKER = `�`;
diff --git a/packages/core/src/render3/instructions/lview_debug.ts b/packages/core/src/render3/instructions/lview_debug.ts
index f25ac583ff..b39230184f 100644
--- a/packages/core/src/render3/instructions/lview_debug.ts
+++ b/packages/core/src/render3/instructions/lview_debug.ts
@@ -18,12 +18,13 @@ import {SelectorFlags} from '../interfaces/projection';
 import {LQueries} from '../interfaces/query';
 import {RComment, RElement, RNode} from '../interfaces/renderer';
 import {StylingContext} from '../interfaces/styling';
+import {isStylingContext} from '../interfaces/type_checks';
 import {BINDING_INDEX, CHILD_HEAD, CHILD_TAIL, CLEANUP, CONTENT_QUERIES, CONTEXT, DECLARATION_VIEW, ExpandoInstructions, FLAGS, HEADER_OFFSET, HOST, HookData, INJECTOR, LView, LViewFlags, NEXT, PARENT, QUERIES, RENDERER, RENDERER_FACTORY, SANITIZER, TData, TVIEW, TView as ITView, TView, T_HOST} from '../interfaces/view';
 import {TStylingContext} from '../styling_next/interfaces';
 import {runtimeIsNewStylingInUse} from '../styling_next/state';
 import {DebugStyling as DebugNewStyling, NodeStylingDebug} from '../styling_next/styling_debug';
 import {attachDebugObject} from '../util/debug_utils';
-import {getTNode, isStylingContext, unwrapRNode} from '../util/view_utils';
+import {getTNode, unwrapRNode} from '../util/view_utils';
 
 
 /*
diff --git a/packages/core/src/render3/instructions/shared.ts b/packages/core/src/render3/instructions/shared.ts
index e68769afeb..5c58bc5f55 100644
--- a/packages/core/src/render3/instructions/shared.ts
+++ b/packages/core/src/render3/instructions/shared.ts
@@ -27,6 +27,7 @@ import {LQueries} from '../interfaces/query';
 import {RComment, RElement, RText, Renderer3, RendererFactory3, isProceduralRenderer} from '../interfaces/renderer';
 import {SanitizerFn} from '../interfaces/sanitization';
 import {StylingContext} from '../interfaces/styling';
+import {isComponent, isComponentDef, isContentQueryHost, isLContainer, isRootView} from '../interfaces/type_checks';
 import {BINDING_INDEX, CHILD_HEAD, CHILD_TAIL, CLEANUP, CONTEXT, DECLARATION_VIEW, ExpandoInstructions, FLAGS, HEADER_OFFSET, HOST, INJECTOR, InitPhaseState, LView, LViewFlags, NEXT, PARENT, QUERIES, RENDERER, RENDERER_FACTORY, RootContext, RootContextFlags, SANITIZER, TData, TVIEW, TView, T_HOST} from '../interfaces/view';
 import {assertNodeOfPossibleTypes, assertNodeType} from '../node_assert';
 import {isNodeMatchingSelectorList} from '../node_selector_matcher';
@@ -37,7 +38,8 @@ import {NO_CHANGE} from '../tokens';
 import {attrsStylingIndexOf} from '../util/attrs_utils';
 import {INTERPOLATION_DELIMITER, renderStringify, stringifyForError} from '../util/misc_utils';
 import {getLViewParent, getRootContext} from '../util/view_traversal_utils';
-import {getComponentViewByIndex, getNativeByIndex, getNativeByTNode, getTNode, isComponent, isComponentDef, isContentQueryHost, isLContainer, isRootView, readPatchedLView, resetPreOrderHookFlags, unwrapRNode, viewAttachedToChangeDetector} from '../util/view_utils';
+import {getComponentViewByIndex, getNativeByIndex, getNativeByTNode, getTNode, readPatchedLView, resetPreOrderHookFlags, unwrapRNode, viewAttachedToChangeDetector} from '../util/view_utils';
+
 import {LCleanup, LViewBlueprint, MatchesArray, TCleanup, TNodeConstructor, TNodeInitialData, TNodeInitialInputs, TNodeLocalNames, TViewComponents, TViewConstructor, attachLContainerDebug, attachLViewDebug, cloneToLView, cloneToTViewData} from './lview_debug';
 import {selectInternal} from './select';
 
diff --git a/packages/core/src/render3/interfaces/type_checks.ts b/packages/core/src/render3/interfaces/type_checks.ts
new file mode 100644
index 0000000000..d78237d863
--- /dev/null
+++ b/packages/core/src/render3/interfaces/type_checks.ts
@@ -0,0 +1,59 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {ComponentDef, DirectiveDef} from '..';
+
+import {LContainer, TYPE} from './container';
+import {TNode, TNodeFlags} from './node';
+import {RNode} from './renderer';
+import {StylingContext} from './styling';
+import {FLAGS, LView, LViewFlags} from './view';
+
+
+/**
+* True if `value` is `LView`.
+* @param value wrapped value of `RNode`, `LView`, `LContainer`, `StylingContext`
+*/
+export function isLView(value: RNode | LView | LContainer | StylingContext | {} | null):
+    value is LView {
+  return Array.isArray(value) && typeof value[TYPE] === 'object';
+}
+
+/**
+ * True if `value` is `LContainer`.
+ * @param value wrapped value of `RNode`, `LView`, `LContainer`, `StylingContext`
+ */
+export function isLContainer(value: RNode | LView | LContainer | StylingContext | {} | null):
+    value is LContainer {
+  return Array.isArray(value) && value[TYPE] === true;
+}
+
+/**
+ * True if `value` is `StylingContext`.
+ * @param value wrapped value of `RNode`, `LView`, `LContainer`, `StylingContext`
+ */
+export function isStylingContext(value: RNode | LView | LContainer | StylingContext | {} | null):
+    value is StylingContext {
+  return Array.isArray(value) && typeof value[TYPE] === 'number';
+}
+
+export function isContentQueryHost(tNode: TNode): boolean {
+  return (tNode.flags & TNodeFlags.hasContentQuery) !== 0;
+}
+
+export function isComponent(tNode: TNode): boolean {
+  return (tNode.flags & TNodeFlags.isComponent) === TNodeFlags.isComponent;
+}
+
+export function isComponentDef<T>(def: DirectiveDef<T>): def is ComponentDef<T> {
+  return (def as ComponentDef<T>).template !== null;
+}
+
+export function isRootView(target: LView): boolean {
+  return (target[FLAGS] & LViewFlags.IsRoot) !== 0;
+}
diff --git a/packages/core/src/render3/node_manipulation.ts b/packages/core/src/render3/node_manipulation.ts
index 951c81d5bd..9336edc656 100644
--- a/packages/core/src/render3/node_manipulation.ts
+++ b/packages/core/src/render3/node_manipulation.ts
@@ -18,11 +18,12 @@ import {TElementContainerNode, TElementNode, TIcuContainerNode, TNode, TNodeFlag
 import {unusedValueExportToPlacateAjd as unused3} from './interfaces/projection';
 import {ProceduralRenderer3, RElement, RNode, RText, Renderer3, isProceduralRenderer, unusedValueExportToPlacateAjd as unused4} from './interfaces/renderer';
 import {StylingContext} from './interfaces/styling';
+import {isLContainer, isLView, isRootView} from './interfaces/type_checks';
 import {CHILD_HEAD, CLEANUP, FLAGS, HOST, HookData, LView, LViewFlags, NEXT, PARENT, QUERIES, RENDERER, TVIEW, T_HOST, unusedValueExportToPlacateAjd as unused5} from './interfaces/view';
 import {assertNodeOfPossibleTypes, assertNodeType} from './node_assert';
 import {renderStringify} from './util/misc_utils';
 import {findComponentView, getLViewParent} from './util/view_traversal_utils';
-import {getNativeByTNode, getNativeByTNodeOrNull, isLContainer, isLView, isRootView, unwrapRNode, viewAttachedToContainer} from './util/view_utils';
+import {getNativeByTNode, getNativeByTNodeOrNull, unwrapRNode, viewAttachedToContainer} from './util/view_utils';
 
 const unusedValueToPlacateAjd = unused1 + unused2 + unused3 + unused4 + unused5;
 
diff --git a/packages/core/src/render3/query.ts b/packages/core/src/render3/query.ts
index a9d914e030..dc31625f1b 100644
--- a/packages/core/src/render3/query.ts
+++ b/packages/core/src/render3/query.ts
@@ -24,9 +24,10 @@ import {unusedValueExportToPlacateAjd as unused1} from './interfaces/definition'
 import {unusedValueExportToPlacateAjd as unused2} from './interfaces/injector';
 import {TContainerNode, TElementContainerNode, TElementNode, TNode, TNodeType, unusedValueExportToPlacateAjd as unused3} from './interfaces/node';
 import {LQueries, unusedValueExportToPlacateAjd as unused4} from './interfaces/query';
+import {isContentQueryHost} from './interfaces/type_checks';
 import {CONTENT_QUERIES, HEADER_OFFSET, LView, QUERIES, TVIEW, TView} from './interfaces/view';
 import {getCurrentQueryIndex, getIsParent, getLView, getPreviousOrParentTNode, isCreationMode, setCurrentQueryIndex} from './state';
-import {isContentQueryHost, loadInternal} from './util/view_utils';
+import {loadInternal} from './util/view_utils';
 import {createElementRef, createTemplateRef} from './view_engine_compatibility';
 
 const unusedValueToPlacateAjd = unused1 + unused2 + unused3 + unused4;
diff --git a/packages/core/src/render3/styling/util.ts b/packages/core/src/render3/styling/util.ts
index 8f302b584d..d5afb98a0b 100644
--- a/packages/core/src/render3/styling/util.ts
+++ b/packages/core/src/render3/styling/util.ts
@@ -11,12 +11,13 @@ import {StyleSanitizeFn} from '../../sanitization/style_sanitizer';
 import {getLContext} from '../context_discovery';
 import {LContainer} from '../interfaces/container';
 import {LContext} from '../interfaces/context';
-import {AttributeMarker, TAttributes, TNode, TNodeFlags} from '../interfaces/node';
+import {TNode, TNodeFlags} from '../interfaces/node';
 import {PlayState, Player, PlayerContext, PlayerIndex} from '../interfaces/player';
 import {RElement} from '../interfaces/renderer';
 import {DirectiveRegistryValuesIndex, InitialStylingValues, StylingContext, StylingFlags, StylingIndex} from '../interfaces/styling';
+import {isStylingContext} from '../interfaces/type_checks';
 import {HEADER_OFFSET, HOST, LView, RootContext} from '../interfaces/view';
-import {getTNode, isStylingContext} from '../util/view_utils';
+import {getTNode} from '../util/view_utils';
 
 import {CorePlayerHandler} from './core_player_handler';
 import {DEFAULT_TEMPLATE_DIRECTIVE_INDEX} from './shared';
diff --git a/packages/core/src/render3/styling_next/instructions.ts b/packages/core/src/render3/styling_next/instructions.ts
index f565579a2b..99c40b7b7a 100644
--- a/packages/core/src/render3/styling_next/instructions.ts
+++ b/packages/core/src/render3/styling_next/instructions.ts
@@ -11,16 +11,17 @@ import {LContainer} from '../interfaces/container';
 import {AttributeMarker, TAttributes, TNode, TNodeType} from '../interfaces/node';
 import {RElement} from '../interfaces/renderer';
 import {StylingContext as OldStylingContext, StylingIndex as OldStylingIndex} from '../interfaces/styling';
-import {BINDING_INDEX, HEADER_OFFSET, HOST, LView, RENDERER, SANITIZER} from '../interfaces/view';
+import {isStylingContext as isOldStylingContext} from '../interfaces/type_checks';
+import {BINDING_INDEX, HEADER_OFFSET, HOST, LView, RENDERER} from '../interfaces/view';
 import {getActiveDirectiveId, getActiveDirectiveSuperClassDepth, getActiveDirectiveSuperClassHeight, getLView, getSelectedIndex} from '../state';
 import {NO_CHANGE} from '../tokens';
 import {renderStringify} from '../util/misc_utils';
-import {getTNode, isStylingContext as isOldStylingContext} from '../util/view_utils';
+import {getTNode} from '../util/view_utils';
 
 import {applyClasses, applyStyles, registerBinding, updateClassBinding, updateStyleBinding} from './bindings';
 import {TStylingContext} from './interfaces';
 import {activeStylingMapFeature, normalizeIntoStylingMap} from './map_based_bindings';
-import {getCurrentStyleSanitizer, setCurrentStyleSanitizer} from './state';
+import {setCurrentStyleSanitizer} from './state';
 import {attachStylingDebugObject} from './styling_debug';
 import {allocTStylingContext, getCurrentOrLViewSanitizer, hasValueChanged, updateContextDirectiveIndex} from './util';
 
diff --git a/packages/core/src/render3/util/discovery_utils.ts b/packages/core/src/render3/util/discovery_utils.ts
index 60c6cf90e3..6a25316952 100644
--- a/packages/core/src/render3/util/discovery_utils.ts
+++ b/packages/core/src/render3/util/discovery_utils.ts
@@ -7,7 +7,6 @@
  */
 
 import {Injector} from '../../di/injector';
-
 import {assertLView} from '../assert';
 import {discoverLocalRefs, getComponentAtNodeIndex, getDirectivesAtNodeIndex, getLContext} from '../context_discovery';
 import {NodeInjector} from '../di';
@@ -15,6 +14,7 @@ import {LContext} from '../interfaces/context';
 import {DirectiveDef} from '../interfaces/definition';
 import {TElementNode, TNode, TNodeProviderIndexes} from '../interfaces/node';
 import {CLEANUP, CONTEXT, FLAGS, HOST, LView, LViewFlags, TVIEW} from '../interfaces/view';
+
 import {stringifyForError} from './misc_utils';
 import {getLViewParent, getRootContext} from './view_traversal_utils';
 import {unwrapRNode} from './view_utils';
diff --git a/packages/core/src/render3/util/view_traversal_utils.ts b/packages/core/src/render3/util/view_traversal_utils.ts
index 7e9af42899..68947854cc 100644
--- a/packages/core/src/render3/util/view_traversal_utils.ts
+++ b/packages/core/src/render3/util/view_traversal_utils.ts
@@ -9,9 +9,11 @@
 import {assertDefined} from '../../util/assert';
 import {assertLView} from '../assert';
 import {TNodeType} from '../interfaces/node';
+import {isLContainer, isLView} from '../interfaces/type_checks';
 import {CONTEXT, DECLARATION_VIEW, FLAGS, LView, LViewFlags, PARENT, RootContext, T_HOST} from '../interfaces/view';
 
-import {isLContainer, isLView, readPatchedLView} from './view_utils';
+import {readPatchedLView} from './view_utils';
+
 
 
 /**
diff --git a/packages/core/src/render3/util/view_utils.ts b/packages/core/src/render3/util/view_utils.ts
index 1c570485bd..67d37015f1 100644
--- a/packages/core/src/render3/util/view_utils.ts
+++ b/packages/core/src/render3/util/view_utils.ts
@@ -6,15 +6,15 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {assertDataInRange, assertDefined, assertDomNode, assertEqual, assertGreaterThan, assertLessThan} from '../../util/assert';
+import {assertDataInRange, assertDefined, assertDomNode, assertGreaterThan, assertLessThan} from '../../util/assert';
 import {assertTNodeForLView} from '../assert';
 import {LContainer, TYPE} from '../interfaces/container';
 import {LContext, MONKEY_PATCH_KEY_NAME} from '../interfaces/context';
-import {ComponentDef, DirectiveDef} from '../interfaces/definition';
-import {TNode, TNodeFlags} from '../interfaces/node';
+import {TNode} from '../interfaces/node';
 import {RNode} from '../interfaces/renderer';
 import {StylingContext} from '../interfaces/styling';
-import {FLAGS, HEADER_OFFSET, HOST, LView, LViewFlags, PARENT, PREORDER_HOOK_FLAGS, TData, TVIEW, TView} from '../interfaces/view';
+import {isLContainer, isLView} from '../interfaces/type_checks';
+import {FLAGS, HEADER_OFFSET, HOST, LView, LViewFlags, PARENT, PREORDER_HOOK_FLAGS, TData, TVIEW} from '../interfaces/view';
 
 
 
@@ -93,32 +93,6 @@ export function unwrapStylingContext(value: RNode | LView | LContainer | Styling
   return null;
 }
 
-/**
- * True if `value` is `LView`.
- * @param value wrapped value of `RNode`, `LView`, `LContainer`, `StylingContext`
- */
-export function isLView(value: RNode | LView | LContainer | StylingContext | {} | null):
-    value is LView {
-  return Array.isArray(value) && typeof value[TYPE] === 'object';
-}
-
-/**
- * True if `value` is `LContainer`.
- * @param value wrapped value of `RNode`, `LView`, `LContainer`, `StylingContext`
- */
-export function isLContainer(value: RNode | LView | LContainer | StylingContext | {} | null):
-    value is LContainer {
-  return Array.isArray(value) && value[TYPE] === true;
-}
-
-/**
- * True if `value` is `StylingContext`.
- * @param value wrapped value of `RNode`, `LView`, `LContainer`, `StylingContext`
- */
-export function isStylingContext(value: RNode | LView | LContainer | StylingContext | {} | null):
-    value is StylingContext {
-  return Array.isArray(value) && typeof value[TYPE] === 'number';
-}
 
 /**
  * Retrieves an element value from the provided `viewData`, by unwrapping
@@ -187,21 +161,6 @@ export function getComponentViewByIndex(nodeIndex: number, hostView: LView): LVi
   return lView;
 }
 
-export function isContentQueryHost(tNode: TNode): boolean {
-  return (tNode.flags & TNodeFlags.hasContentQuery) !== 0;
-}
-
-export function isComponent(tNode: TNode): boolean {
-  return (tNode.flags & TNodeFlags.isComponent) === TNodeFlags.isComponent;
-}
-
-export function isComponentDef<T>(def: DirectiveDef<T>): def is ComponentDef<T> {
-  return (def as ComponentDef<T>).template !== null;
-}
-
-export function isRootView(target: LView): boolean {
-  return (target[FLAGS] & LViewFlags.IsRoot) !== 0;
-}
 
 /**
  * Returns the monkey-patch value data present on the target (which could be
diff --git a/packages/core/src/render3/view_engine_compatibility.ts b/packages/core/src/render3/view_engine_compatibility.ts
index d7a06ed835..3355d8741c 100644
--- a/packages/core/src/render3/view_engine_compatibility.ts
+++ b/packages/core/src/render3/view_engine_compatibility.ts
@@ -22,6 +22,7 @@ import {addToViewTree, createEmbeddedViewAndNode, createLContainer, renderEmbedd
 import {ACTIVE_INDEX, CONTAINER_HEADER_OFFSET, LContainer, VIEW_REFS} from './interfaces/container';
 import {TContainerNode, TElementContainerNode, TElementNode, TNode, TNodeType, TViewNode} from './interfaces/node';
 import {RComment, RElement, isProceduralRenderer} from './interfaces/renderer';
+import {isComponent, isLContainer, isLView, isRootView} from './interfaces/type_checks';
 import {CONTEXT, LView, QUERIES, RENDERER, TView, T_HOST} from './interfaces/view';
 import {assertNodeOfPossibleTypes} from './node_assert';
 import {addRemoveViewFromContainer, appendChild, detachView, getBeforeNodeForView, insertView, nativeInsertBefore, nativeNextSibling, nativeParentNode, removeView} from './node_manipulation';
@@ -29,7 +30,7 @@ import {getParentInjectorTNode} from './node_util';
 import {getLView, getPreviousOrParentTNode} from './state';
 import {getParentInjectorView, hasParentInjector} from './util/injector_utils';
 import {findComponentView} from './util/view_traversal_utils';
-import {getComponentViewByIndex, getNativeByTNode, isComponent, isLContainer, isLView, isRootView, unwrapRNode, viewAttachedToContainer} from './util/view_utils';
+import {getComponentViewByIndex, getNativeByTNode, unwrapRNode, viewAttachedToContainer} from './util/view_utils';
 import {ViewRef} from './view_ref';
 
 
diff --git a/packages/core/test/render3/view_utils_spec.ts b/packages/core/test/render3/view_utils_spec.ts
index 6526a33836..73cd3c0b29 100644
--- a/packages/core/test/render3/view_utils_spec.ts
+++ b/packages/core/test/render3/view_utils_spec.ts
@@ -7,8 +7,9 @@
  */
 
 import {createLContainer, createLView, createTNode, createTView} from '@angular/core/src/render3/instructions/shared';
+import {isLContainer, isLView, isStylingContext} from '@angular/core/src/render3/interfaces/type_checks';
 import {createEmptyStylingContext} from '@angular/core/src/render3/styling/util';
-import {isLContainer, isLView, isStylingContext, unwrapLContainer, unwrapLView, unwrapRNode, unwrapStylingContext} from '@angular/core/src/render3/util/view_utils';
+import {unwrapLContainer, unwrapLView, unwrapRNode, unwrapStylingContext} from '@angular/core/src/render3/util/view_utils';
 
 describe('view_utils', () => {
   it('should verify unwrap methods', () => {