How to set enterMode to CKEDITOR.ENTER_BR for a Text Datatype?

[hoekiesda]

Documentation says:
"It's possible to pass a custom CKEditor config object to the wysiwyg editor."

{
  toolbarGroups : [ { name: 'links' }],
  enterMode: CKEDITOR.CKEDITOR.ENTER_BR,
}

That might work in code, but the "Editor Configuration" option in the "Specific Settings" for a WYSIWYG Datatype in the Classes does not accept this JSON snippet. See screenshot below.

Pimcore demo says:

Uncaught Error: You're trying to decode an invalid JSON String: {
  toolbarGroups : [ { name: 'links' }],
  enterMode: CKEDITOR.CKEDITOR.ENTER_BR,
}

Validate JSON would be:

{
	"toolbarGroups": [{
		"name": "links"
	}],
	"enterMode": "CKEDITOR.CKEDITOR.ENTER_BR"
}

But I doubt that it means the same thing. Pimcore demo accepts this JSON and the toolbar is indeed altered. But no effect on the <p></p> wrapping behaviour of CKEditor, see: https://ckeditor.com/docs/ckeditor4/latest/features/enterkey.html

I tried: "enterMode": "CKEDITOR.CKEDITOR.ENTER_BR", "enterMode": CKEDITOR.CKEDITOR.ENTER_BR, "enterMode": "CKEDITOR.ENTER_BR".

Now i ask how to set the enterMode via the Class Definition? Thanks upfront!

[hoekiesda]

{
	"enterMode": 2
}

[dolmit-tanel-paaro]

{
	"enterMode": CKEDITOR.ENTER_BR
}