{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"//"}]}
    // All body-owners have MIR associated with them.
fn mir_keys(tcx: TyCtxt<'_>, (): ()) -> FxIndexSet<LocalDefId> {
    let mut set: FxIndexSet<_> = tcx.hir_body_owners().collect();