Callback before object deletation. This will return the 'GUID' of the object instead of whole instance like in annotation.
~~~
<?php
function my_component_init(){
ossn_register_callback('object', 'before:delete', 'my_component_cb');
}
function my_component_cb($callback, $type, $params){
$guid = $params['guid'];
if($object = ossn_get_object($guid)){
error_log(print_r($object, true));
}
}
~~~