syntax_data: {"ast_node_type":"variable","tokens":[{"end":56,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if let ty::Placeholder(placeholder) = t.kind() {
context_before:     fn visit_ty(&mut self, t: Ty<'tcx>) {
context_after:             self.max_universe = self.max_universe.max(placeholder.universe);