code: @Override
      public DeleteDBSecurityGroupResult deleteDBSecurityGroup(DeleteDBSecurityGroupRequest request) {
          request = beforeClientExecution(request);
          return executeDeleteDBSecurityGroup(request);
      }
docs: <p>
  Deletes a DB security group.
  </p>
  <note>
  <p>
  The specified DB security group must not be associated with any DB instances.
  </p>
  </note>
  
  @param deleteDBSecurityGroupRequest
  @return Result of the DeleteDBSecurityGroup operation returned by the service.
  @throws InvalidDBSecurityGroupStateException
  The state of the DB security group doesn't allow deletion.
  @throws DBSecurityGroupNotFoundException
  <i>DBSecurityGroupName</i> doesn't refer to an existing DB security group.
  @sample AmazonRDS.DeleteDBSecurityGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/DeleteDBSecurityGroup" target="_top">AWS API
  Documentation</a>