syntax_data: {"ast_node_type":"variable","tokens":[{"end":38,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // `let ref_src = &src_place;`
context_before:         let ref_src = self.temp(Ty::new_ref(self.tcx, re_erased, ty, mutability), span);
context_after:         // or `let ref_src = &mut src_place;`