syntax_data: {"ast_node_type":"function","tokens":[{"end":53,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn try_super_fold_with<F: FallibleTypeFolder<I>>(
context_before: impl<I: Interner, T: TypeFoldable<I>> TypeSuperFoldable<I> for Binder<I, T> {
context_after:         self,