Calendar External Event Drop

Would it be possible to add External Event Dropping to the Calendar?

https://fullcalendar.io/docs/v4/external-dragging

Custom Buttons would be cool too… https://fullcalendar.io/docs/customButtons

How I use this in my custom FullCalendar code is to have a button which opens a panel that has a list of all the unscheduled events which I can drag onto the calendar.

Thanks!