# File lib/fog/aws/requests/rds/add_tags_to_resource.rb, line 29
        def add_tags_to_resource(rds_id, tags)
          response = Excon::Response.new
          if server = self.data[:servers][rds_id]
            self.data[:tags][rds_id].merge! tags
            response.status = 200
            response.body = {
              "ResponseMetadata"=>{ "RequestId"=> Fog::AWS::Mock.request_id }
            }
            response
          else
            raise Fog::AWS::RDS::NotFound.new("DBInstance #{rds_id} not found")
          end
        end