c_g_signal_add_emission_hook

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
gulong function(uint signalId, GQuark detail, GSignalEmissionHook hookFunc, void* hookData, GDestroyNotify dataDestroy) c_g_signal_add_emission_hook;

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