@angular/forms declares several directives and a module which are not
exported from the package via the entrypoint, either intentionally or as a
historical accident.
Ivy's locality principle necessitates that directives used in user code be
importable from the package which defines them. This requires these forms
directives to be exported.
Several directives which define ControlValueAccessors are exported:
* NumberValueAccessor
* RangeValueAccessor
A few more directives and a module are exported privately (with a ɵ prefix):
* NgNoValidate
* NgSelectMultipleOption
* InternalFormsSharedModule
PR Close#27743
ac157170c8