def principal(self) -> PrincipalRequestBuilder:
        """
        Provides operations to manage the principal property of the microsoft.graph.unifiedRoleScheduleInstanceBase entity.
        """
        from .principal.principal_request_builder import PrincipalRequestBuilder

        return PrincipalRequestBuilder(self.request_adapter, self.path_parameters)

        Provides operations to manage the principal property of the microsoft.graph.unifiedRoleScheduleInstanceBase entity.
        
msgraph/generated/role_management/entitlement_management/role_assignment_schedule_instances/item/unified_role_assignment_schedule_instance_item_request_builder.py