public function setPermissionOverwritesAttribute($overwrites)
    {
        $this->attributes['permission_overwrites'] = $overwrites;

        if (! is_null($overwrites)) {
            foreach ($overwrites as $overwrite) {
                $overwrite               = (array) $overwrite;
                $overwrite['channel_id'] = $this->id;

                $this->overwrites->push($overwrite);
            }
        }
    }