syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"impl<I:"}]}
source_snippet:             impl<I: $crate::Interner> $crate::TypeFoldable<I> for $ty {
context_before:         $(
context_after:                 fn try_fold_with<F: $crate::FallibleTypeFolder<I>>(