syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"impl<I:"}]}
source_snippet: impl<I: Interner, T: TypeFoldable<I>> TypeFoldable<I> for Binder<I, T> {
context_after:     fn try_fold_with<F: FallibleTypeFolder<I>>(self, folder: &mut F) -> Result<Self, F::Error> {