code: @Override
      public DescribeStaleSecurityGroupsResult describeStaleSecurityGroups(DescribeStaleSecurityGroupsRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeStaleSecurityGroups(request);
      }
docs: <p>
  [VPC only] Describes the stale security group rules for security groups in a specified VPC. Rules are stale when
  they reference a deleted security group in a peer VPC, or a security group in a peer VPC for which the VPC
  peering connection has been deleted.
  </p>
  
  @param describeStaleSecurityGroupsRequest
  @return Result of the DescribeStaleSecurityGroups operation returned by the service.
  @sample AmazonEC2.DescribeStaleSecurityGroups
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/DescribeStaleSecurityGroups"
  target="_top">AWS API Documentation</a>