Trigger upon comments `object` menu is generated. You can register menu for comment object type within this hook.
~~~
<?php
function my_component_init(){
ossn_register_callback('comment', 'object:comment:like:menu', 'my_component_cb');
}
function my_component_cb($callback, $type, $params){
// $params['object'] contains OssnObject instance.
}
ossn_register_callback('ossn', 'init', 'my_component_init');
~~~
Comment menu for object type
