docs: def get_comment(self, comment_id):
          """Gets the ``Comment`` specified by its ``Id``.
  
          arg:    comment_id (osid.id.Id): the ``Id`` of the ``Comment``
                  to retrieve
          return: (osid.commenting.Comment) - the returned ``Comment``
          raise:  NotFound - no ``Comment`` found with the given ``Id``
          raise:  NullArgument - ``comment_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*
  
          """
          # Implemented from template for
          # osid.resource.ResourceLookupSession.get_resource
          # NOTE: This implementation currently ignores plenary view
          collection = JSONClientValidated('commenting',
                                           collection='Comment',
                                           runtime=self._runtime)
          result = collection.find_one(
              dict({'_id': ObjectId(self._get_id(comment_id, 'commenting').get_identifier())},
                   **self._view_filter()))
          return objects.Comment(osid_object_map=result, runtime=self._runtime, proxy=self._proxy)