docs: def set_assessments(self, assessment_ids=None):
          """Sets the assessments.
  
          arg:    assessmentIds (osid.id.Id): the assessment Ids
          raise:  INVALID_ARGUMENT - assessmentIds is invalid
          raise:  NullArgument - assessmentIds is null
          raise:  NoAccess - metadata.is_read_only() is true
          compliance: mandatory - This method must be implemented.
  
          """
          if assessment_ids is None:
              raise NullArgument()
          metadata = Metadata(**settings.METADATA['assessment_ids'])
          if metadata.is_read_only():
              raise NoAccess()
          if self._is_valid_input(assessment_ids, metadata, array=True):
              for assessment_id in assessment_ids:
                  self._my_map['assessmentIds'].append(str(assessment_id))
          else:
              raise InvalidArgument