Add API for matching signal handlers based on the bound 'this' object
The following discussion from !371 (merged) should be addressed:
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@fmuellner started a discussion: (+4 comments) Would it be possible to have something like
GObject.SignalMatchType.DATA
too? That is, match on thethis
object used by the handler.The use case I'm thinking of is blocking anonymous handlers in gnome-shell from an extension.