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