code: @Override
      public DBSecurityGroup createDBSecurityGroup(CreateDBSecurityGroupRequest request) {
          request = beforeClientExecution(request);
          return executeCreateDBSecurityGroup(request);
      }
docs: <p>
  Creates a new DB security group. DB security groups control access to a DB instance.
  </p>
  <note>
  <p>
  A DB security group controls access to EC2-Classic DB instances that are not in a VPC.
  </p>
  </note>
  
  @param createDBSecurityGroupRequest
  @return Result of the CreateDBSecurityGroup operation returned by the service.
  @throws DBSecurityGroupAlreadyExistsException
  A DB security group with the name specified in <i>DBSecurityGroupName</i> already exists.
  @throws DBSecurityGroupQuotaExceededException
  The request would result in the user exceeding the allowed number of DB security groups.
  @throws DBSecurityGroupNotSupportedException
  A DB security group isn't allowed for this action.
  @sample AmazonRDS.CreateDBSecurityGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/CreateDBSecurityGroup" target="_top">AWS API
  Documentation</a>