77     public static function getInstanceLiteralValue($elmInstance) {  argument
78         $strValue = $elmInstance->getStringValue();
84     public function _evaluateWellFormed($elmInstance) {  argument
85         $userName = self::getInstanceLiteralValue($elmInstance);
96     public function ensureWellFormed($elmInstance) {  argument
97         parent::ensureWellFormed($elmInstance);
98         if (count($elmInstance->args()) != 1) {
99 …throw new MalformedExpressionException($elmInstance, 'A subexpression must have exactly one root');
102     public function _evaluateWellFormed($elmInstance) {  argument
103         return $elmInstance->evaluateArgs()[0];
112     public function ensureWellFormed($elmInstance) {  argument
113         parent::ensureWellFormed($elmInstance);
114         if (!($elmInstance->args()[0]->definition() instanceof Literal)) {
115 …throw new MalformedExpressionException($elmInstance, 'A in-group operator <@> must take exactly on…
118     public function _evaluateWellFormed($elmInstance) {  argument
119         $literalInstance = $elmInstance->args()[0];
130     public function _evaluateWellFormed($elmInstance) {  argument
131         $argValues = $elmInstance->evaluateArgs();
133 …       throw new InvalidExpressionException($elmInstance, 'Not called on a non-boolean argument.');
144     public function _evaluateWellFormed($elmInstance) {  argument
145         $argValues = $elmInstance->evaluateArgs();
148 …        throw new InvalidExpressionException($elmInstance, 'And called on non-boolean arguments.');
163     public function _evaluateWellFormed($elmInstance) {  argument
164         $argValues = $elmInstance->evaluateArgs();
167 …         throw new InvalidExpressionException($elmInstance, 'Or called on non-boolean arguments.');