for (int i = 0; i < 10; i++) {
          assertEquals(unfiltered.lower(i), filtered.lower(i));
          assertEquals(unfiltered.floor(i), filtered.floor(i));
          assertEquals(unfiltered.ceiling(i), filtered.ceiling(i));
          assertEquals(unfiltered.higher(i), filtered.higher(i));
        }
      }
    }
  }

  private FilteredCollectionsTestUtil() {}

    assertEquals(ImmutableMap.of("four", 4), filtered);

    unfiltered.clear();
    assertEquals(ImmutableMap.of(), unfiltered);
    assertEquals(ImmutableMap.of(), filtered);
  }

  public void testFilteredValuesIllegalPut() {
    Map<String, Integer> unfiltered = createUnfiltered();
    Map<String, Integer> filtered = Maps.filterValues(unfiltered, EVEN);
    filtered.put("a", 2);
    unfiltered.put("b", 4);

    unfiltered.put("foo", 55556);
    unfiltered.put("badkey", 1);
    unfiltered.put("foo", 1);
    Multimap<String, Integer> keyFiltered = filterKeys(unfiltered, KEY_PREDICATE);
    Multimap<String, Integer> filtered = filterValues(keyFiltered, VALUE_PREDICATE);
    assertEquals(1, filtered.size());
    assertTrue(filtered.containsEntry("foo", 1));

    unfiltered.put("foo", 55556);
    unfiltered.put("badkey", 1);
    unfiltered.put("foo", 1);
    Multimap<String, Integer> keyFiltered = filterKeys(unfiltered, KEY_PREDICATE);
    Multimap<String, Integer> filtered = filterValues(keyFiltered, VALUE_PREDICATE);
    assertEquals(1, filtered.size());
    assertTrue(filtered.containsEntry("foo", 1));

    checkNotNull(unfiltered);
    checkNotNull(entryPredicate);
    return (unfiltered instanceof FilteredEntryBiMap)
        ? filterFiltered((FilteredEntryBiMap<K, V>) unfiltered, entryPredicate)
        : new FilteredEntryBiMap<K, V>(unfiltered, entryPredicate);
  }

  /**
   * Support {@code clear()}, {@code removeAll()}, and {@code retainAll()} when filtering a filtered
   * map.
   */

    checkNotNull(unfiltered);
    checkNotNull(entryPredicate);
    return (unfiltered instanceof FilteredEntryBiMap)
        ? filterFiltered((FilteredEntryBiMap<K, V>) unfiltered, entryPredicate)
        : new FilteredEntryBiMap<K, V>(unfiltered, entryPredicate);
  }

  /**
   * Support {@code clear()}, {@code removeAll()}, and {@code retainAll()} when filtering a filtered
   * map.
   */

			}
			filtered = append(filtered, ep)
		}
		llb.LbEndpoints = filtered
		filteredCount += len(llb.LbEndpoints)
	}

	return cla, filteredCount

        List<MavenProject> filtered = new ArrayList<>(projects.size());
        for (MavenProject project : projects) {
            if (whiteList.containsKey(project)) {
                filtered.add(project);
            } else if (!transitive) {
                filtered.addAll(upstream ? getUpstreamProjects(project, false) : getDownstreamProjects(project, false));
            }
        }

    }
    if (unfiltered instanceof FilteredSet) {
      // Support clear(), removeAll(), and retainAll() when filtering a filtered
      // collection.
      FilteredSet<E> filtered = (FilteredSet<E>) unfiltered;
      Predicate<E> combinedPredicate = Predicates.and(filtered.predicate, predicate);
      return new FilteredSet<>((Set<E>) filtered.unfiltered, combinedPredicate);
    }

	if err != nil {
		return []corev1.Namespace{}, err
	}
	filtered := filterSystemNamespaces(nsList.Items, istioNamespace)
	filtered = slices.Filter(filtered, func(namespace corev1.Namespace) bool {
		return !ambient.InAmbient(&namespace)
	})
	sort.Slice(filtered, func(i, j int) bool {
		return filtered[i].Name < filtered[j].Name
	})
	return filtered, nil
}