Error with multiple params in entity, symfony2

Question

I had given the following error:

Catchable Fatal Error: Argument 1 passed to BackendBundle\Entity\Notification::sendSystemMessage() 
must be an instance of BackendBundle\Entity\BackendBundle\Entity\User, instance of 
Proxies\__CG__\BackendBundle\Entity\User given

the method I have in my Notification.php class is:

/**
     * Send System message, to be used after creating a blank one
     *
     * @param \BackendBundle\Entity\User $reciever
     *
     * @param string $message
     *
     * @return Notification
     */
    public function sendSystemMessage(BackendBundle\Entity\User $reciever, $message)
    {
        $this->setReciever($reciever);
        $this->setMessage($message);
        $this->setTimestamp(new \DateTime());
        $this->setReaded(false);
        $this->setSystemMessage(true);

        return $this;
    }

when I use the setters and getters like setReciever, it works perfectly, but when I try to call multiple params I got this error, I'm I making a mistake or there can't be a multiple parameters method in the entities classes?

Answer 1

Credits to Cerad.

My problem was that I had

public function sendSystemMessage(BackendBundle\Entity\User $reciever, $message)

when I needed

public function sendSystemMessage(\BackendBundle\Entity\User $reciever, $message)

that backslash was getting me a different path for the User class