assertFalse("removeIf(x -> false) should return false", collection.removeIf(x -> false));
    expectUnchanged();
  }

  @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
  @CollectionSize.Require(absent = ZERO)
  public void testRemoveIf_sometimesTrue() {
    assertTrue(
        "removeIf(isEqual(present)) should return true",
        collection.removeIf(Predicate.isEqual(samples.e0())));

    assertTrue(
        removeIf(
            list,
            new Predicate<String>() {
              @Override
              public boolean apply(String s) {
                return s.equals("b") || s.equals("d") || s.equals("f");
              }
            }));
    assertEquals(newArrayList("a", "c", "e"), list);
    assertFalse(
        removeIf(
            list,

    return Iterables.removeIf(
        multimap.unfiltered().entries(),
        // explicit <Entry<K, V>> is required to build with JDK6
        Predicates.<Entry<K, V>>and(
            multimap.entryPredicate(), Maps.<V>valuePredicateOnEntries(Predicates.in(c))));
  }

  @Override
  public boolean retainAll(Collection<?> c) {
    return Iterables.removeIf(
        multimap.unfiltered().entries(),

                props.put(overrideName, substVars(value, name, props, callback));
            } else {
                props.put(name, substVars(value, name, props, callback));
            }
        }
        props.keySet().removeIf(k -> k.startsWith(OVERRIDE_PREFIX));
    }

    private static MavenProperties loadPropertiesFile(
            Path path, boolean failIfNotFound, Function<String, String> callback) throws IOException {

        T transform(@ParametricNullness F from) {
          return function.apply(from);
        }
      };
    }

    @Override
    public boolean removeIf(Predicate<? super T> filter) {
      checkNotNull(filter);
      return fromList.removeIf(element -> filter.test(function.apply(element)));
    }

    private static final long serialVersionUID = 0;
  }

  /**

    } catch (UnsupportedOperationException expected) {
    }
    assertCollectionsAreEquivalent(multiset, copy);

    try {
      multiset.removeIf(x -> false);
      fail("removeIf(Predicate) succeeded on unmodifiable collection");
    } catch (UnsupportedOperationException expected) {
    }
    assertCollectionsAreEquivalent(multiset, copy);

 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.base.Predicates.equalTo;
import static com.google.common.collect.Iterables.removeIf;
import static com.google.common.collect.Lists.newArrayList;
import static com.google.common.collect.Maps.immutableEntry;
import static com.google.common.collect.ReflectionFreeAssertThrows.assertThrows;

    assertEquals(newArrayList("a", "c", "e"), list);
  }

  public void testRemoveIf() {
    List<String> list = newArrayList("a", "b", "c", "d", "e");
    assertTrue(
        Iterators.removeIf(
            list.iterator(),
            new Predicate<String>() {
              @Override
              public boolean apply(String s) {
                return s.equals("b") || s.equals("d") || s.equals("f");

    assertEquals(newArrayList("a", "c", "e"), list);
  }

  public void testRemoveIf() {
    List<String> list = newArrayList("a", "b", "c", "d", "e");
    assertTrue(
        Iterators.removeIf(
            list.iterator(),
            new Predicate<String>() {
              @Override
              public boolean apply(String s) {
                return s.equals("b") || s.equals("d") || s.equals("f");

      synchronized (mutex) {
        return delegate().retainAll(c);
      }
    }

    @Override
    public boolean removeIf(Predicate<? super E> filter) {
      synchronized (mutex) {
        return delegate().removeIf(filter);
      }
    }

    @Override
    public int size() {
      synchronized (mutex) {
        return delegate().size();
      }
    }