Doctrine\Common\Collections\ArrayCollection::offsetSet PHP Method

    public function offsetSet($offset, $value)
    {
        if (!isset($offset)) {
            return $this->add($value);
        }
        $this->set($offset, $value);
    }

 public function offsetSet($offset, $value)
 {
     if (null === $this->entries) {
         $this->__load___();
     }
     return $this->entries->offsetSet($offset, $value);
 }