   #home Signals and Callbacks What are Callbacks? Connecting Signals

       Signals and Callbacks
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Signal Inheritance

   Signals are inherited by objects, just as methods are. A widget can
   emit any signals that its ancestor objects have defined, as well as
   its own specific signals.

   In cases where the signal is not relevant to the widget but is
   nonetheless inherited by it, there will be no error message when the
   signal is called - but equally, there will be no obvious means for the
   widget to emit that particular signal.
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