Check if selected signal are already present in an Qt Gui application

[Ratzz]

I have a several lines of code and I have various items like widgets ,buttons in my Gui application.
Is there any way to find the already added signals for widgets/buttons?
Say, Right clicking the push button gives me go to slot option and many signals listed . There is a push button and already a clicked() signal is used.I want to get the already added signal for that particular push button.