    # File lib/fog/aws/requests/rds/describe_db_parameter_groups.rb, line 16
            def describe_db_parameter_groups(name=nil, opts={})
              params={}
              if opts[:marker]
                params['Marker'] = opts[:marker]
              end
              if name
                params['DBParameterGroupName'] = name
              end
              if opts[:max_records]
                params['MaxRecords'] = opts[:max_records]
              end

              request({
                'Action'  => 'DescribeDBParameterGroups',
                :parser   => Fog::Parsers::AWS::RDS::DescribeDBParameterGroups.new
              }.merge(params))
            end