{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":")"}]}
    ) -> Option<ty::EarlyBinder<'tcx, Ty<'tcx>>> {
        sizedness: ty::SizedTraitKind,
        if self.is_struct() { tcx.adt_sizedness_constraint((self.did(), sizedness)) } else { None }