# File lib/AWS/RDS/rds.rb, line 228
228:       def describe_db_parameter_groups( options = {} )
229:         params = {}
230:         params['DBParameterGroupName'] = options[:db_parameter_group_name] if options.has?(:db_parameter_group_name)
231:         params['MaxRecords'] = options[:max_records].to_s if options.has?(:max_records)
232:         params['Marker'] = options[:marker] if options.has?(:marker)
233: 
234:         return response_generator(:action => "DescribeDBParameterGroups", :params => params)
235:       end