Calling an event from a third party plugin in my plugin Trying to work out if I’m doing something wrong with catching an event from another plugin in my plugin.

I’m trying to use amforms “onSaveSubmission” event, so, in my plugin’s init() 
function i have

craft()-&gt;on('amForms.onSaveSubmission', function(Event $event) {
    var_dump($event);
});


But, when I submit a form successfully, this event is triggering an error:

Internal Server Error

Property "Craft\AmFormsService.onSaveSubmission" is not defined.


The onSaveSubmission event is in /plugins/amforms/services/AmForms_SubmissionsService.php
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