# File lib/rds/rds.rb, line 210
    def revoke_db_security_group_ingress(group_name, ip_range, options={})
      params                        = {}
      params['DBSecurityGroupName'] = group_name
      params['CIDRIP']              = ip_range
      link                          = do_request("RevokeDBSecurityGroupIngress", params)
    rescue Exception
      on_exception
    end