yii\base\ArrayAccessTrait::offsetSet PHP Метод

This method is required by the interface [[\ArrayAccess]].

public offsetSet ( integer $offset, mixed $item )
$offset	integer	the offset to set element
$item	mixed	the element value

    public function offsetSet($offset, $item)
    {
        $this->data[$offset] = $item;
    }

ArrayAccessTrait