Pinq\Parsing\FunctionSignature::getParameterExpression PHP Method

    private static function getParameterExpression(\ReflectionParameter $parameter)
    {
        $typeHint = null;
        if ($parameter->isArray()) {
            $typeHint = 'array';
        } elseif ($parameter->isCallable()) {
            $typeHint = 'callable';
        } elseif ($parameter->getClass() !== null) {
            $typeHint = $parameter->getClass()->getName();
            $typeHint = $typeHint[0] === '\\' ? $typeHint : '\\' . $typeHint;
        }
        return O\Expression::parameter($parameter->getName(), $typeHint, $parameter->isDefaultValueAvailable() ? O\Expression::value($parameter->getDefaultValue()) : null, $parameter->isPassedByReference(), method_exists($parameter, 'isVariadic') && $parameter->isVariadic());
    }