public function chunk($count, callable $callback)
{
$this->enforceOrderBy();
$page = 1;
do {
$results = $this->forPage($page, $count)->get();
$countResults = $results->count();
if ($countResults == 0) {
break;
}
// On each chunk result set, we will pass them to the callback and then let the
// developer take care of everything within the callback, which allows us to
// keep the memory low for spinning through large result sets for working.
if (call_user_func($callback, $results) === false) {
return false;
}
$page++;
} while ($countResults == $count);
return true;
}