{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"//"}]}
        // SAFETY: `ConstArg` is `repr(C)` and `ConstArgKind` is marked `repr(u8)` so that the
    pub fn as_unambig_ct(&self) -> &ConstArg<'hir> {
        // layout is the same across different ZST type arguments.