Migrate toward java.util.function.Predicate

- Package-private changes only
- Maintains binary and source compatibility

src/main/java/org/apache/commons/collections4/functors/ChainedClosure.java

@@ -118,7 +118,7 @@ public class ChainedClosure<E> implements Closure<E>, Serializable {
      * @since 3.1
      */
     public Closure<? super E>[] getClosures() {
-        return FunctorUtils.<E>copy(iClosures);
+        return FunctorUtils.copy(iClosures);
     }
 
 }

src/main/java/org/apache/commons/collections4/functors/FunctorUtils.java

@@ -81,17 +81,17 @@ final class FunctorUtils {
     }
 
     /**
-     * Clone the closures to ensure that the internal reference can't be messed with.
+     * Clones the consumers to ensure that the internal references can't be updated.
      *
-     * @param closures  the closures to copy
-     * @return the cloned closures
+     * @param consumers  the consumers to copy.
+     * @return the cloned consumers.
      */
     @SuppressWarnings("unchecked")
-    static <E> Closure<E>[] copy(final Closure<? super E>... closures) {
-        if (closures == null) {
+    static <C extends Consumer<?>> C[] copy(final C... consumers) {
+        if (consumers == null) {
             return null;
         }
-        return (Closure<E>[]) closures.clone();
+        return consumers.clone();
     }
 
     /**

src/main/java/org/apache/commons/collections4/functors/SwitchClosure.java

@@ -157,7 +157,7 @@ public class SwitchClosure<E> implements Closure<E>, Serializable {
      * @since 3.1
      */
     public Closure<? super E>[] getClosures() {
-        return FunctorUtils.<E>copy(iClosures);
+        return FunctorUtils.copy(iClosures);
     }
 
     /**