syntax_data: {"ast_node_type":"function","tokens":[{"end":91,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn visit_binder<T: TypeVisitable<I>>(&mut self, t: &ty::Binder<I, T>) -> Self::Result {
context_before:     type Result = ControlFlow<()>;
context_after:         self.binder.shift_in(1);