code: @Override
      public java.util.concurrent.Future<ListTaskDefinitionFamiliesResult> listTaskDefinitionFamiliesAsync(
              com.amazonaws.handlers.AsyncHandler<ListTaskDefinitionFamiliesRequest, ListTaskDefinitionFamiliesResult> asyncHandler) {
  
          return listTaskDefinitionFamiliesAsync(new ListTaskDefinitionFamiliesRequest(), asyncHandler);
      }
docs: Simplified method form for invoking the ListTaskDefinitionFamilies operation with an AsyncHandler.
  
  @see #listTaskDefinitionFamiliesAsync(ListTaskDefinitionFamiliesRequest, com.amazonaws.handlers.AsyncHandler)