{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"//"}]}
    // N.B., this `borrow()` is guaranteed to be valid (i.e., the value
fn mir_const_qualif(tcx: TyCtxt<'_>, def: LocalDefId) -> ConstQualifs {
    // cannot yet be stolen), because `mir_promoted()`, which steals