Calling an event from a third party plugin in my plugin
craft()-&gt;on('amForms_submissions.saveSubmission', function(Event $event) {
    BusinessLogicPlugin::log(print_r($event, true));
});


Pay attention to the casing
Craft\AmForms_SubmissionsService → amForms_submissions

https://craftcms.com/docs/plugins/hooks-and-events#listening-for-events