Pinq\Parsing\FunctionSignature::func PHP Method

    public static function func($returnsReference, $name, array $parameterExpressions)
    {
        return new self(self::TYPE_FUNCTION, $returnsReference, null, null, null, $name, $parameterExpressions, null);
    }

 private function getFunctionNodeSignature(Node\Stmt\Function_ $node)
 {
     return FunctionSignature::func($node->byRef, $node->name, $this->getParameterExpressions($node->params));
 }