syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"Ty::new_mut_ref(tcx,"}]}
source_snippet:         Ty::new_mut_ref(tcx, tcx.lifetimes.re_erased, context_ty)
context_before:         let context_ty = Ty::new_adt(tcx, context_adt_ref, context_args);
context_after:     }