[sigc] getting number of connected slots

Hi all,

Sorry if this is in the documentation somewhere, I couldn't find it.
I'm writing a library that exposes a few signal objects that users of the library can connect to. Now I have a situation where I want to do a default operation if the user of the library hasn't connected a slot to one of those signals. Is there a way to get the number of slots that are connected to a signal? Are there any other ways I can do this? Thanks.



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