Deprecate IterableUtils 0-argument constructor

src/changes/changes.xml

@@ -203,6 +203,9 @@
     <action dev="ggregory" type="fix" due-to="Martin Wiesner, Bruno P. Kinoshita, Gary Gregory">
       Fix punctuation and minor Javadoc issues #409.
     </action>
+    <action dev="ggregory" type="fix" due-to="Gary Gregory">
+      Deprecate IterableUtils 0-argument constructor.
+    </action>
     <!-- ADD -->
     <action issue="COLLECTIONS-843" dev="ggregory" type="add" due-to="Claude Warren, Alex Herbert, Gary Gregory">
       Implement Layered Bloom filter #402.

src/main/java/org/apache/commons/collections4/IterableUtils.java

@@ -1040,4 +1040,13 @@ public class IterableUtils {
         };
     }
 
+    /**
+     * Make private in 5.0.
+     *
+     * @deprecated TODO Make private in 5.0.
+     */
+    @Deprecated
+    public IterableUtils() {
+        // empty
+    }
 }