Am I using the correct do_action to add my own extension to Anspress plugin?

This is found in anspress-question-answer.php. I see that there is a ” do_action(‘anspress_loaded’); “. Is this what I use to add my own extension (similar to your categories-for-anspress extension)? I’m asking because I don’t think categories-for-anspress extension is using this…

/**
* Initializes the plugin by setting localization, hooks, filters, and administrative functions.
* @return instance
*/
public static function instance()
{
if (! isset(self::$instance) && ! (self::$instance instanceof AnsPress)) {
self::$instance = new AnsPress();
self::$instance->_setup_constants();

add_action('plugins_loaded', array( self::$instance, 'load_textdomain' ));


add_action('bp_loaded', array( self::$instance, 'bp_include' ));

global $ap_classes;
$ap_classes = array();

self::$instance->includes();

self::$instance->anspress_forms = new AnsPress_Process_Form();
self::$instance->anspress_actions = new AnsPress_Actions();
self::$instance->anspress_ajax = new AnsPress_Ajax();
self::$instance->anspress_query_filter = new AnsPress_Query_Filter();
self::$instance->anspress_theme = new AnsPress_Theme();
self::$instance->anspress_cpt = new AnsPress_PostTypes();
self::$instance->anspress_reputation = new AP_Reputation();
self::$instance->anspress_users = new AnsPress_User();
///self::$instance->third_party = new AnsPress_3rd_party();

/**
* ACTION: anspress_loaded
* Hooks for extension to load their codes after AnsPress is leaded
*/
do_action('anspress_loaded');
}

return self::$instance;
}