How can I check is there end event in diagram?

I need to disable save button, while there is no end event.
So that`s why I need to know how to modeler for this purpose.

Through the element registry you can do find out if there is an end event:

import { is } from 'bpmn-js/lib/util/ModelUtil';


const hasEndEvent = modeler
  .find(element => is(element, 'bpmn:EndEvent'));
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Thank you! It works!

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