code: def reset_parameter_group(self, name, reset_all_params=False,
                                parameters=None):
          
          params = {'DBParameterGroupName':name}
          if reset_all_params:
              params['ResetAllParameters'] = 'true'
          else:
              params['ResetAllParameters'] = 'false'
              for i in range(0, len(parameters)):
                  parameter = parameters[i]
                  parameter.merge(params, i+1)
          return self.get_status('ResetDBParameterGroup', params)
docs: Resets some or all of the parameters of a ParameterGroup to the
          default value
  
          :type key_name: string
          :param key_name: The name of the ParameterGroup to reset
  
          :type parameters: list of :class:`boto.rds.parametergroup.Parameter`
          :param parameters: The parameters to reset.  If not supplied,
                             all parameters will be reset.