syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"impl<I:"}]}
source_snippet: impl<I: Interner, T: TypeVisitable<I>> TypeVisitable<I> for Option<T> {
context_after:     fn visit_with<V: TypeVisitor<I>>(&self, visitor: &mut V) -> V::Result {