syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"self.current_index.shift_in(1);"}]}
source_snippet:         self.current_index.shift_in(1);
context_before:     fn fold_binder<T: TypeFoldable<I>>(&mut self, t: ty::Binder<I, T>) -> ty::Binder<I, T> {
context_after:         let t = t.super_fold_with(self);