PHPDoc type hinting for array of objects Follow

// core class
class ArrayCollection extends Countable, IteratorAggregate, ArrayAcces {

    /* @var array */
    // array of objects
    private $_elements;

    public function key()
    {
        return key($this->_elements);
    }
    
    public function next()
    {
        return next($this->_elements);
    }
    
    public function current()
    {
        return current($this->_elements);
    }

}

class B { }

class A

    private $items;

     /**
     * @return B[]
     */
     public function getItems()
     {
          // say $this->items already contains an ArrayCollection class instance with an array of B class objects inside.
          return $this->items;
     }
}

it works okay. However i have not just an array of objects of type B, i have an ArrayCollection object which implements ArrayAccess, which contains an array of objects of type B.

So $items = $a->getItems();
$items[0]->somemethod() suggest correctly
but
$items->
does not suggest anything.