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