code: @Override
      public DescribeSecurityGroupsResult describeSecurityGroups(DescribeSecurityGroupsRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeSecurityGroups(request);
      }
docs: <p>
  Describes the specified security groups or all of your security groups.
  </p>
  <p>
  A security group is for use with instances either in the EC2-Classic platform or in a specific VPC. For more
  information, see <a href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html">Amazon
  EC2 Security Groups</a> in the <i>Amazon Elastic Compute Cloud User Guide</i> and <a
  href="https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_SecurityGroups.html">Security Groups for Your
  VPC</a> in the <i>Amazon Virtual Private Cloud User Guide</i>.
  </p>
  
  @param describeSecurityGroupsRequest
  @return Result of the DescribeSecurityGroups operation returned by the service.
  @sample AmazonEC2.DescribeSecurityGroups
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/DescribeSecurityGroups" target="_top">AWS API
  Documentation</a>