/**
* reloads the elements of the collection
* by calling the finder function
*
* @return number of records after refresh
*/
function refresh()
{
if (is_callable($this->finder)) {
$data = call_user_func($this->finder);
$this->exchangeArray($data);
$this->deleted->exchangeArray(array());
return $this->last_count = $this->count();
}
}
