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