code: def assign_objective_requisite(self, objective_id, requisite_objective_id):
          
          requisite_type = Type(**Relationship().get_type_data('OBJECTIVE.REQUISITE'))
  
          ras = self._get_provider_manager(
              'RELATIONSHIP').get_relationship_admin_session_for_family(
              self.get_objective_bank_id(), proxy=self._proxy)
          rfc = ras.get_relationship_form_for_create(objective_id, requisite_objective_id, [])
          rfc.set_display_name('Objective Requisite')
          rfc.set_description('An Objective Requisite created by the ObjectiveRequisiteAssignmentSession')
          rfc.set_genus_type(requisite_type)
          ras.create_relationship(rfc)
docs: Creates a requirement dependency between two ``Objectives``.
  
          arg:    objective_id (osid.id.Id): the ``Id`` of the dependent
                  ``Objective``
          arg:    requisite_objective_id (osid.id.Id): the ``Id`` of the
                  required ``Objective``
          raise:  AlreadyExists - ``objective_id`` already mapped to
                  ``requisite_objective_id``
          raise:  NotFound - ``objective_id`` or
                  ``requisite_objective_id`` not found
          raise:  NullArgument - ``objective_id`` or
                  ``requisite_objective_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*