src/Helpers/Request/RequestAppHelperProxy.php
private function proxyWithAppProperty($method, $arguments = [], $position = -1, $propertyName = 'charset')
    {
        $this->injectVariableToArguments($this->app->{$propertyName}, $arguments, $position);
        return $this->proxy($method, $arguments);
    }
private function proxyWithAppProperty($method, $arguments = [], $position = -1, $propertyName = 'charset')
    {
        $this->injectVariableToArguments($this->app->{$propertyName}, $arguments, $position);
        return $this->proxy($method, $arguments);
    }
Proxy to Helper with added parameter at given position
@param string $method
@param array  $arguments
@param int    $position
@param string $propertyName
@return mixed