syntax_data: {"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let ref_ty = Ty::new_imm_ref(tcx, tcx.lifetimes.re_static, ct_ty);
context_before:                 // for the following transformation from valtree to raw bytes
context_after:                 let cv = ty::Value { ty: ref_ty, valtree };