docs: def alias_objective(self, objective_id, alias_id):
          """Adds an ``Id`` to an ``Objective`` for the purpose of creating compatibility.
  
          The primary ``Id`` of the ``Objective`` is determined by the
          provider. The new ``Id`` performs as an alias to the primary
          ``Id``. If the alias is a pointer to another objective, it is
          reassigned to the given objective ``Id``.
  
          arg:    objective_id (osid.id.Id): the ``Id`` of an
                  ``Objective``
          arg:    alias_id (osid.id.Id): the alias ``Id``
          raise:  AlreadyExists - ``alias_id`` is already assigned
          raise:  NotFound - ``objective_id`` not found
          raise:  NullArgument - ``objective_id`` or ``alias_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.ResourceAdminSession.alias_resources_template
          self._alias_id(primary_id=objective_id, equivalent_id=alias_id)