Set<Feature<?>> result = computeDerivedCollectionFeatures(multimapFeatures);
    if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_VALUES)) {
      result.add(CollectionFeature.ALLOWS_NULL_VALUES);
    }
    if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_VALUE_QUERIES)) {
      result.add(CollectionFeature.ALLOWS_NULL_QUERIES);
    }
    return result;
  }

                            const float* values, int num_values) {
  auto s =
      tensorflow::unwrap(op)->SetAttrFloatList(attr_name, values, num_values);
  if (!s.ok()) {
    LOG(WARNING) << "Unable to set attribute: " << attr_name;
  }
}

void TFE_OpSetAttrIntList(TFE_Op* op, const char* attr_name,
                          const int64_t* values, int num_values) {
  auto s =

                  }
                })
            .named("TreeMultimap nullsFirst")
            .withFeatures(
                MapFeature.ALLOWS_NULL_KEYS,
                MapFeature.ALLOWS_NULL_VALUES,
                MapFeature.ALLOWS_ANY_NULL_QUERIES,
                MapFeature.GENERAL_PURPOSE,
                MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
                CollectionFeature.SUPPORTS_ITERATOR_REMOVE,

              }

              @Override
              public @Nullable String put(String key, String value) {
                checkNotNull(key);
                return map.put(key, value);
              }
            };
          }
        },
        "HashMap w/out null keys",
        ALLOWS_NULL_VALUES);
  }

  private static Test testsForHashMapNullValuesForbidden() {
    return wrappedHashMapTests(

    Set<Feature<?>> result = computeDerivedCollectionFeatures(multimapFeatures);
    if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_VALUES)) {
      result.add(CollectionFeature.ALLOWS_NULL_VALUES);
    }
    if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_VALUE_QUERIES)) {
      result.add(CollectionFeature.ALLOWS_NULL_QUERIES);
    }
    return result;
  }

    if (mapFeatures.contains(MapFeature.ALLOWS_NULL_VALUE_QUERIES)) {
      valuesCollectionFeatures.add(CollectionFeature.ALLOWS_NULL_QUERIES);
    }
    if (mapFeatures.contains(MapFeature.ALLOWS_NULL_VALUES)) {
      valuesCollectionFeatures.add(CollectionFeature.ALLOWS_NULL_VALUES);
    }

    return valuesCollectionFeatures;
  }

              }

              @Override
              public @Nullable String put(String key, String value) {
                checkNotNull(key);
                return map.put(key, value);
              }
            };
          }
        },
        "HashMap w/out null keys",
        ALLOWS_NULL_VALUES);
  }

  private static Test testsForHashMapNullValuesForbidden() {
    return wrappedHashMapTests(

                                                  const float* values,
                                                  int num_values);
TF_CAPI_EXPORT extern void TFE_OpSetAttrBoolList(TFE_Op* op,
                                                 const char* attr_name,
                                                 const unsigned char* values,
                                                 int num_values);

            .withFeatures(
                CollectionSize.SEVERAL,
                CollectionSize.ONE,
                CollectionFeature.SERIALIZABLE,
                CollectionFeature.ALLOWS_NULL_VALUES)
            .createTestSuite());

    suite.addTest(
        ListTestSuiteBuilder.using(
                new TestStringListGenerator() {
                  @Override

    /** Uses an {@link ArrayList} to store value collections. */
    public ListMultimapBuilder<K0, @Nullable Object> arrayListValues() {
      return arrayListValues(DEFAULT_EXPECTED_VALUES_PER_KEY);
    }

    /**
     * Uses an {@link ArrayList} to store value collections, initialized to expect the specified
     * number of values per key.
     *