{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"(VarValue::Empty(a_ui),"}]}
            (VarValue::Empty(a_ui), VarValue::Empty(b_ui)) => {
            (VarValue::ErrorValue, _) | (_, VarValue::ErrorValue) => return true,
                // Empty regions are ordered according to the universe