docs: def getPriorities(self, projectarea_id=None, projectarea_name=None):
          """Get all :class:`rtcclient.models.Priority` objects by
          project area id or name
  
          At least either of `projectarea_id` and `projectarea_name` is given.
  
          If no :class:`rtcclient.models.Priority` is retrieved,
          `None` is returned.
  
          :param projectarea_id: the :class:`rtcclient.project_area.ProjectArea`
              id
          :param projectarea_name: the project area name
          :return: a :class:`list` contains all the
              :class:`rtcclient.models.Priority` objects
          :rtype: list
          """
  
          return self._getPriorities(projectarea_id=projectarea_id,
                                     projectarea_name=projectarea_name)