assertThat(map.keySet().toString()).isEqualTo("[" + JOINER.join(map.keySet()) + "]");
    assertThat(map.values().toString()).isEqualTo("[" + JOINER.join(map.values()) + "]");

    assertEquals(new HashSet<>(map.entrySet()), map.entrySet());
    assertEquals(new HashSet<>(map.keySet()), map.keySet());
  }

  }

  @LazyInit private transient @Nullable Set<K> keySet;

  @Override
  public Set<K> keySet() {
    Set<K> result = keySet;
    return (result == null) ? keySet = new KeySet() : result;
  }

  @WeakOuter
  private final class KeySet extends ForwardingSet<K> {
    @Override
    protected Set<K> delegate() {
      return delegate.keySet();
    }

    @Override
    public void clear() {

                    }
                    return multimap.keySet();
                  }

                  @Override
                  public List<String> order(List<String> insertionOrder) {
                    return Ordering.natural().nullsFirst().sortedCopy(insertionOrder);
                  }
                })
            .named("TreeMultimap.keySet")
            .withFeatures(

                sources.put(name, false);
            }
        }

        licenses.keySet().removeAll(ignoreFiles);
        notices.keySet().removeAll(ignoreFiles);
        sources.keySet().removeAll(ignoreFiles);

        checkDependencies(licenses, notices, sources, shaFiles);

    } catch (RuntimeException tolerated) {
      // GWT's TreeMap.keySet().removeAll(null) doesn't throws NPE.
    }
  }

  @Override
  public void testKeySetRetainAllNullFromEmpty() {
    try {
      super.testKeySetRetainAllNullFromEmpty();
    } catch (RuntimeException tolerated) {
      // GWT's TreeMap.keySet().retainAll(null) doesn't throws NPE.
    }
  }

  @Override

    // Even though rowKeySet, columnKeySet, and cellSet have the same
    // iteration ordering, row has an inconsistent ordering.
    assertThat(table.row('b').keySet()).containsExactly(1, 2).inOrder();
    assertThat(ImmutableTable.copyOf(table).row('b').keySet()).containsExactly(2, 1).inOrder();
  }

  public void testCopyOfSparse() {
    Table<Character, Integer, String> table = TreeBasedTable.create();

FIELD com.google.common.util.concurrent.AggregateFuture.runningState
FIELD java.util.AbstractMap.keySet com.google.common.collect.AbstractMapBasedMultimap.NavigableKeySet
FIELD java.util.AbstractMap.keySet com.google.common.collect.Maps.FilteredEntryNavigableMap.navigableKeySet.$
FIELD java.util.AbstractMap.keySet com.google.common.collect.TreeRangeMap.SubRangeMap.SubRangeMapAsMap.keySet.$

    assertThat(multimap.keySet()).containsExactly("foo", "bar", "cow").inOrder();
    assertThat(multimap.removeAll("foo")).containsExactly(6, 7).inOrder();
    assertThat(multimap.keySet()).containsExactly("bar", "cow").inOrder();
    assertTrue(multimap.remove("bar", 4));
    assertThat(multimap.keySet()).containsExactly("bar", "cow").inOrder();
    assertTrue(multimap.remove("bar", 1));

        initParams.put("jcifs.http.insecureBasic", "true");
        initParams.put("jcifs.http.basicRealm", "TestRealm");

        when(filterConfig.getInitParameterNames()).thenReturn(Collections.enumeration(initParams.keySet()));
        when(filterConfig.getInitParameter(anyString())).thenAnswer(invocation -> initParams.get(invocation.getArgument(0)));

        assertDoesNotThrow(() -> filter.init(filterConfig));
    }

    @Test

                        ArrayTable.create(rowKeys, columnKeys);
                    populateForRowKeySet(table, elements);
                    return table.column(1).keySet();
                  }
                })
            .named("ArrayTable.column.keySet")
            .withFeatures(
                CollectionSize.ONE,
                CollectionSize.SEVERAL,
                CollectionFeature.KNOWN_ORDER,