Cannot edit data class attributes

[LeonBein]

When
In the data modeler, I edit data class attributes and confirm changes with enter or left-click-outside

I expected
That the entered attributes would be permanently displayed in the data class

But actually
The data class stayed blank

[LeonBein]

This is no bug, as the intended behavior is to not accept text that does not conform "attributeName : dataType", where dataType is one of a predefined set.
Cp.

fCM-design-support/app/lib/datamodelmodeler/features/label-editing/cmd/UpdateLabelHandler.js

Lines 58 to 60 in b769a3c

	var check_re_class = /[A-Za-z]+: string|String|integer|Integer|int|Int|Str|str|Float|float|Boolean|boolean|bool|Bool$/
	if (!text.match(check_re_class)) {
	text = oldText;

However, this behavior is unintuitive in that there is no indicator to the user on why text was not accepted; if there is no knowledge about this code line, users will assume it to be a bug.