syntax_data: {"ast_node_type":"function","tokens":[{"end":77,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn has_vars_bound_at_or_above(&self, binder: ty::DebruijnIndex) -> bool {
context_after:         self.visit_with(&mut HasEscapingVarsVisitor { outer_index: binder }).is_break()