code: def blockSelectionSignals( self, state ):
          
          if ( self._selectionSignalsBlocked == state ):
              return
          
          self._selectionSignalsBlocked = state
          if ( not state ):
              self.emitSelectionFinished()
docs: Sets the state for the seleciton finished signal.  When it \
          is set to True, it will emit the signal.  This is used \
          internally to control selection signal propogation, so  \
          should not really be called unless you know why you are \
          calling it.
                      
          :param      state   <bool>