syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"must_be_overridden,"}]}
source_snippet:             must_be_overridden,
context_before:             name: tcx.item_name(def_id),
context_after:             const_stable: tcx.has_attr(def_id, sym::rustc_intrinsic_const_stable_indirect),