Should we test the various metadata combinations. Eg:

[pepone]

Should we test the various metadata combinations. Eg:

[compress:params] ... [compress:return] ...

Also, what happens if I write something like: [compress:return] void myOp(); or

[compress:params] string myOp();```

_Originally posted by @externl in https://github.com/zeroc-ice/ice/pull/979_