    # File lib/fog/aws/requests/rds/create_db_parameter_group.rb, line 34
            def create_db_parameter_group(group_name, group_family, description)
              response = Excon::Response.new
              if self.data[:parameter_groups] and self.data[:parameter_groups][group_name]
                raise Fog::AWS::RDS::IdentifierTaken.new("Parameter group #{group_name} already exists")
              end

              data = {
                'DBParameterGroupName' => group_name,
                'DBParameterGroupFamily' => group_family.downcase,
                'Description' => description
              }
              self.data[:parameter_groups][group_name] = data

              response.body = {
                "ResponseMetadata"=>{ "RequestId"=> Fog::AWS::Mock.request_id },
                "CreateDBParameterGroupResult"=> {"DBParameterGroup"=> data}
              }
              response.status = 200
              response

            end