Follow-up from "Resolve "Method validateThing(..) passing wrong argument to validate(..)""

The following discussion from !6 (merged) should be addressed:

@krlwlfrt started a discussion: (+6 comments)

Please note, that only "things" from StAppsCore have the type attribute.

Hm, actually what we could use here is simple type check if field type exists:

  public validateThing<T extends {type: string}>(instance: T): ValidatorResult {

EDIT:

It just makes no sense to keep up the deprecated method. This issue and the upcoming Merge Request will delete the deprecated method.