{"ast_node_type":"function","tokens":[{"end":94,"kind":"keyword","start":0,"text":"fn"}]}
    fn child_by_source_to(&self, db: &dyn DefDatabase, res: &mut DynMap, file_id: HirFileId) {
impl ChildBySource for ItemScope {
        self.declarations().for_each(|item| add_module_def(db, res, file_id, item));