code: @Override
      public DBSecurityGroup revokeDBSecurityGroupIngress(RevokeDBSecurityGroupIngressRequest request) {
          request = beforeClientExecution(request);
          return executeRevokeDBSecurityGroupIngress(request);
      }
docs: <p>
  Revokes ingress from a DBSecurityGroup for previously authorized IP ranges or EC2 or VPC Security Groups.
  Required parameters for this API are one of CIDRIP, EC2SecurityGroupId for VPC, or (EC2SecurityGroupOwnerId and
  either EC2SecurityGroupName or EC2SecurityGroupId).
  </p>
  
  @param revokeDBSecurityGroupIngressRequest
  @return Result of the RevokeDBSecurityGroupIngress operation returned by the service.
  @throws DBSecurityGroupNotFoundException
  <i>DBSecurityGroupName</i> doesn't refer to an existing DB security group.
  @throws AuthorizationNotFoundException
  The specified CIDRIP or Amazon EC2 security group isn't authorized for the specified DB security
  group.</p>
  <p>
  RDS also may not be authorized by using IAM to perform necessary actions on your behalf.
  @throws InvalidDBSecurityGroupStateException
  The state of the DB security group doesn't allow deletion.
  @sample AmazonRDS.RevokeDBSecurityGroupIngress
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/RevokeDBSecurityGroupIngress"
  target="_top">AWS API Documentation</a>