{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"impl_def.get_or_create_assoc_item_list().add_item(syntax::ast::AssocItem::Fn(fn_));"}]}
    impl_def.get_or_create_assoc_item_list().add_item(syntax::ast::AssocItem::Fn(fn_));
    ted::replace(impl_def.assoc_item_list()?.syntax(), assoc_list.syntax());