/**
* Filters a copy of the items in the collection.
*
* Overridden to load any data that has not yet been loaded.
*
* @param callback $filter Callback to use for filtering.
* @param array $options The available options are:
* - `'collect'`: If `true`, the results will be returned wrapped
* in a new `Collection` object or subclass.
* @return mixed The filtered items. Will be an array unless `'collect'` is defined in the
* `$options` argument, then an instance of this class will be returned.
*/
public function find($filter, array $options = array())
{
$this->offsetGet(null);
return parent::find($filter, $options);
}