# File lib/fog/aws/requests/rds/revoke_db_security_group_ingress.rb, line 35
        def revoke_db_security_group_ingress(name, opts = {})
          unless opts.key?('CIDRIP') || (opts.key?('EC2SecurityGroupName') && opts.key?('EC2SecurityGroupOwnerId'))
            raise ArgumentError, 'Must specify CIDRIP, or both EC2SecurityGroupName and EC2SecurityGroupOwnerId'
          end
          
          response = Excon::Response.new
          
          if sec_group = self.data[:security_groups][name]
            if opts.key?('CIDRIP')
              sec_group['IPRanges'].each do |iprange|
                iprange['Status']= 'revoking' if iprange['CIDRIP'] == opts['CIDRIP']
              end
            else
              sec_group['EC2SecurityGroups'].each do |ec2_secg|
                ec2_secg['Status']= 'revoking' if ec2_secg['EC2SecurityGroupName'] == opts['EC2SecurityGroupName']
              end
            end
            response.status = 200
            response.body = {
              "ResponseMetadata"=>{ "RequestId"=> Fog::AWS::Mock.request_id },
              'RevokeDBSecurityGroupIngressResult' => {          
                'DBSecurityGroup' => sec_group
              }
            }
            response
          else
            raise Fog::AWS::RDS::NotFound.new("DBSecurityGroupNotFound => #{name} not found")
          end
        end