pub trait InstanceSystem: Lifecycle {
// Required methods
fn get_entity_instance_import_export_manager(
&self,
) -> Arc<dyn EntityInstanceImportExportManager + Send + Sync>;
fn get_relation_instance_import_export_manager(
&self,
) -> Arc<dyn RelationInstanceImportExportManager + Send + Sync>;
fn reactive_system(&self) -> Arc<dyn ReactiveSystem + Send + Sync>;
}