The method checkPayloadType() has a lot of issues:
Currently this method does not work at all, because the required schemas pagination.schema.json and locale.schema.json are not known by the validator. So the validation always fails and the method returns always none.
There exists a pagination.schema.json and a paginationGet.schema.json. Without context this method cannot know if it shall check the payload of a PUB-message or a GET-message.
The return type is a string which is not very type-safe.
The method only checks for two payload types. It is also strange that 'none' is returned in case that the payload is a mam, profile, health etc.
The method is part of the OPCUABuilder-class and has nothing to do with building of OPC UA messages.
I suggest to delete this method for the above reasons.
The method
checkPayloadType()has a lot of issues:none.I suggest to delete this method for the above reasons.