Problem with using ReferencedNodes about opcua

[kung-foo]

@sruehl is there overlap with the issue described here? #619

[sruehl]

@magiconair could it be that this todo is the root cause?
node_id.go:16 "// todo(fs): fix mask"

[sruehl]

#683 fixes the issue

[sruehl]

I think it is basically the same Problem. Although I like the way #619 is a bit more efficient I would prefer having a NodeFromExpandedNode factory function which copies the values and set's the mask like it is done in #619. The function there called RemoveExpandedFlag doesn't make much sense outside the copy scenario. My approach does that externals so the NodeFromExpandedNode would be more efficient because it has access to the private fields. I could update the PR with that suggestion if wanted.

[sruehl]

my approach == #683