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