syntax_data: {"ast_node_type":"variable","tokens":[{"end":33,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let metadata_ty =
context_before:                 let pointee_metadata = Ty::new_projection(tcx, metadata_def_id, [pointee]);
context_after:                     match tcx.try_normalize_erasing_regions(cx.typing_env, pointee_metadata) {