assertTrue(SmbSession.class.isAssignableFrom((Class<?>) unwrapMethod.getReturnType()),
                        "unwrap method should return SmbSession or subtype");
            }, "unwrap(Class) method should be properly defined");
        }

        @Test
        @DisplayName("Should handle unwrap with SmbSession type")

    }

    @Override
    Collection<V2> createValues() {
      return Collections2.transform(fromTable.values(), function);
    }

    @Override
    public Map<R, Map<C, V2>> rowMap() {
      return Maps.transformValues(fromTable.rowMap(), row -> Maps.transformValues(row, function));
    }

    @Override
    public Map<C, Map<R, V2>> columnMap() {
      return Maps.transformValues(

            assertSame(mockSmbPipeHandleInternal, unwrapped, "Unwrap should return the underlying handle implementation.");
        }

        /**
         * Verifies that unwrap returns null if the requested type is not available.
         */
        @Test
        public void testUnwrap_ReturnsNullForUnsupportedType() {

        assertDoesNotThrow(() -> {
            mockCredentials.unwrap(Credentials.class);
            mockCredentials.getUserDomain();
            mockCredentials.isAnonymous();
            mockCredentials.isGuest();
        });
    }

    @Test
    @DisplayName("Should unwrap to correct type")
    void testUnwrap() {
        // Given
        when(mockCredentials.unwrap(Credentials.class)).thenReturn(mockCredentials);

  @Override
  public ImmutableMap<R, Map<C, V>> rowMap() {
    // Casts without copying.
    return ImmutableMap.copyOf(rowMap);
  }

  @Override
  public int size() {
    return cellRowIndices.length;
  }

  @Override
  Cell<R, C, V> getCell(int index) {
    int rowIndex = cellRowIndices[index];
    Entry<R, ImmutableMap<C, V>> rowEntry = rowMap.entrySet().asList().get(rowIndex);

        return delegate.getContext();
    }

    @Override
    @SuppressWarnings("unchecked")
    public <T extends SmbTransport> T unwrap(Class<T> type) {
        if (type.isAssignableFrom(this.getClass())) {
            return (T) this;
        }
        return delegate.unwrap(type);
    }

    @Override
    public void close() {
        try {
            disconnect(true, false);

      cellRowIndices[i] = rowIndex;
      cellColumnIndices[i] = columnIndex;
    }
    this.cellRowIndices = cellRowIndices;
    this.cellColumnIndices = cellColumnIndices;
    this.rowMap = new RowMap();
    this.columnMap = new ColumnMap();
  }

  /** An immutable map implementation backed by an indexed nullable array. */

     * Unwraps this session to the specified type, allowing access to implementation-specific functionality.
     *
     * @param <T> the type to unwrap to
     * @param type the class of the type to unwrap to
     * @return session instance with the given type
     */
    <T extends SmbSession> T unwrap(Class<T> type);

    /**
     * Returns the CIFS context that this session is attached to.
     *

 * @author mbechler
 *
 */
public interface Credentials {

    /**
     * Unwrap credentials to a specific type.
     *
     * @param <T> the credential type to unwrap to
     * @param type the class of the credential type to unwrap to
     * @return instance for type, null if the type cannot be unwrapped
     */
    <T extends Credentials> T unwrap(Class<T> type);

    /**
     * Get the domain of the user account.

    return;
  }
  status->status = tensorflow::unwrap(ctx)->EnableCollectiveOps(server_def);
}

TF_CAPI_EXPORT extern void TFE_AbortCollectiveOps(TFE_Context* ctx,
                                                  TF_Status* status) {
  tensorflow::EagerContext* context =
      tensorflow::ContextFromInterface(tensorflow::unwrap(ctx));
  auto collective_executor_handle = context->GetCollectiveExecutorHandle();