Change record status: 
Project: 
Introduced in branch: 
8.0.x
Introduced in version: 
8.0.0-alpha15
Description: 

The submit() method is removed from EntityFormInterface. Instead, subclasses use submitForm(), defined in FormInterface.

When EntityFormController was first written, it had both submit() and save() methods, and they were attached directly to each button. Then when EntityFormController was moved to implement FormInterface, it gained a submitForm() method.

Impacts: 
Module developers