syntax_data: {"ast_node_type":"variable","tokens":[{"end":83,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let ref_str_ty = Ty::new_imm_ref(tcx, tcx.lifetimes.re_erased, ty);
context_before:                 // This works because `str` and `&str` have the same valtree representation.
context_after:                 PatKind::Constant {