.collect(Collectors.groupingBy(Function.identity(), Collectors.counting()))
                            .entrySet()
                            .stream()
                            .filter(p -> p.getValue() > 1)
                            .map(Map.Entry::getKey)
                            .collect(Collectors.toSet());
                }
            }
        }
        return duplicateIds;
    }

        setupEpg(_epgMap, et -> ((RoleType) et).getUpdatedTime(), (et, vl) -> ((RoleType) et).setUpdatedTime(DfTypeUtil.toLong(vl)),
                "updatedTime");
        setupEpg(_epgMap, et -> ((RoleType) et).getValue(), (et, vl) -> ((RoleType) et).setValue(DfTypeUtil.toString(vl)), "value");
    }

    @Override
    public PropertyGateway findPropertyGateway(final String prop) {
        return doFindEpg(_epgMap, prop);
    }

                    Map<String, String> map = CompactLinkedHashMap.create();
                    for (Entry<String, String> entry : entries) {
                      map.put(entry.getKey(), entry.getValue());
                    }
                    return map;
                  }
                })
            .named("CompactLinkedHashMap")
            .withFeatures(
                CollectionSize.ANY,

  @Override
  public boolean putAll(Multimap<? extends K, ? extends V> multimap) {
    boolean changed = false;
    for (Entry<? extends K, ? extends V> entry : multimap.entries()) {
      changed |= put(entry.getKey(), entry.getValue());
    }
    return changed;
  }

  @CanIgnoreReturnValue
  @Override
  public Collection<V> replaceValues(@ParametricNullness K key, Iterable<? extends V> values) {
    checkNotNull(values);

      ImmutableSortedMap.Builder<String, String> builder = ImmutableSortedMap.naturalOrder();
      for (Entry<String, String> entry : entries) {
        checkNotNull(entry);
        builder.put(entry.getKey(), entry.getValue());
      }
      return builder.build();
    }
  }

  public static class ImmutableSortedMapCopyOfEntriesGenerator
      extends TestStringSortedMapGenerator {
    @Override

   */
  public void putAll(Map<? extends K, ? extends Long> m) {
    for (Entry<? extends K, ? extends Long> entry : m.entrySet()) {
      put(entry.getKey(), entry.getValue());
    }
  }

  /**
   * Removes and returns the value associated with {@code key}. If {@code key} is not in the map,
   * this method has no effect and returns zero.
   */
  @CanIgnoreReturnValue

        Set<Path> errorPoms = new HashSet<>();

        for (Map.Entry<Path, Document> entry : pomMap.entrySet()) {
            Path pomPath = entry.getKey();
            Document pomDocument = entry.getValue();
            processedPoms.add(pomPath);

            context.info(pomPath + " (checking for Maven 4 compatibility issues)");
            context.indent();

            try {

            new TestStringMapGenerator() {
              @Override
              protected Map<String, String> create(Entry<String, String>[] entries) {
                return singletonMap(entries[0].getKey(), entries[0].getValue());
              }
            })
        .named("singletonMap")
        .withFeatures(
            MapFeature.ALLOWS_NULL_KEYS,
            MapFeature.ALLOWS_NULL_VALUES,

    R getRowKey();

    /** Returns the column key of this cell. */
    @ParametricNullness
    C getColumnKey();

    /** Returns the value of this cell. */
    @ParametricNullness
    V getValue();

    /**
     * Compares the specified object with this cell for equality. Two cells are equal when they have
     * equal row keys, column keys, and values.
     */
    @Override

    // If it's an Entry, it may become invalid once it's removed from the Map. Copy it.
    if (element instanceof Entry) {
      Entry<?, ?> entry = (Entry<?, ?>) element;
      element = mapEntry(entry.getKey(), entry.getValue());
    }
    assertTrue(collection.contains(element)); // sanity check
    iterator.remove();
    assertFalse(collection.contains(element));
    assertEquals(originalSize - 1, collection.size());
  }