[antlr-interest] Mask shift-reduce warning?

[Clifford Heath]

I have a grammar which has an unavoidable shift-reduce ambiguity,
and I'm happy with the default reduce behaviour. However, I don't
like my code to compile with expected warnings, as they tend to
mask unexpected warnings.

Can I tell ANTLR that a given (sub-)rule is known to be ambiguous
and not to warn me about it every time?

Clifford Heath.