getMap().putIfAbsent(k0(), null);
    } catch (NullPointerException tolerated) {
    }
    expectUnchanged();
    expectNullValueMissingWhenNullValuesUnsupported(
        "Should not contain null after unsupported putIfAbsent(present, null)");
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  public void testPut_nullValueSupported() {
    Entry<K, V> nullValueEntry = entry(k3(), null);
    assertNull(

     *
     * @param session the {@link Session}, must not be {@code null}
     * @param installationToolchainsFile The {@link Source} pointing to the installation toolchains, must not be {@code null}
     * @param userToolchainsSource The {@link Source} pointing to the user toolchains, must not be {@code null}
     * @throws ToolchainsBuilderException if the project cannot be created

            }
        }
        return null;
    }

    /**
     * Check if the response contains any durable handle context
     * @return true if durable handle context is present
     */
    public boolean hasDurableHandleResponse() {
        return getDurableHandleResponse() != null || getDurableHandleV2Response() != null || getDurableHandleReconnectResponse() != null;
    }

    /**
     * {@inheritDoc}

    public String toString() {
        return "[" + (md == null ? "no metadata" : md.toString()) + "]";
    }

    // ---------------------------------------------------------------------
    private static int compareStrings(String s1, String s2) {
        if (s1 == null && s2 == null) {
            return 0;
        }

        if (s1 == null /* && s2 != null */) {
            return -1;
        }

        if (

     * @param pathMappingList the path mapping list
     */
    public void setPathMappingList(final String sessionId, final List<PathMapping> pathMappingList) {
        if (sessionId != null) {
            if (pathMappingList != null) {
                pathMappingMap.put(sessionId, pathMappingList);
            } else {
                removePathMappingList(sessionId);
            }
        }
    }

    /**

                    return e;
                }
            }

            return null;
        }

        @SuppressWarnings({"unchecked", "checkstyle:methodlength"})
        private void traverseObjectWithParents(Class<?> cls, Object target) throws ModelInterpolationException {
            if (cls == null) {
                return;
            }

            if (cls.isArray()) {

        @Override
        public Path getPath() {
            return null;
        }

        @Override
        public Source resolve(String relative) {
            return null;
        }

        @Override
        @Nullable
        public ModelSource resolve(@Nonnull ModelLocator modelLocator, @Nonnull String relative) {
            return null;
        }
    }

    /**

        doUpdate(entity, null);
    }

    public void insertOrUpdate(FileAuthentication entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(FileAuthentication entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

    return rowKey != null && safeContainsKey(backingMap, rowKey);
  }

  @Override
  public boolean containsValue(@Nullable Object value) {
    return value != null && super.containsValue(value);
  }

  @Override
  public @Nullable V get(@Nullable Object rowKey, @Nullable Object columnKey) {
    return (rowKey == null || columnKey == null) ? null : super.get(rowKey, columnKey);
  }

        if (_conditionQuery != null) {
            QueryBuilder queryBuilder = _conditionQuery.getQuery();
            if (queryBuilder != null) {
                builder.setQuery(queryBuilder);
            }
            _conditionQuery.getFieldSortBuilderList().forEach(sort -> {
                builder.addSort(sort);
            });
        }

        if (_conditionAggregation != null) {