syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"impl<I:"}]}
source_snippet: impl<I: Interner, T: TypeFoldable<I>> TypeSuperFoldable<I> for Binder<I, T> {
context_after:     fn try_super_fold_with<F: FallibleTypeFolder<I>>(