{"ast_node_type":"variable","tokens":[{"end":54,"kind":"keyword","start":0,"text":"let"}]}
        let Ok(layout) = self.ecx.layout_of(ty) else {
    fn type_may_have_niche_of_interest_to_backend(&self, ty: Ty<'tcx>) -> bool {
            // If it's too generic or something, then assume it might be interesting later.