code: def get_next_step(self):
          
          if self.rbAggLayerFromCanvas.isChecked():
              new_step = self.parent.step_fc_agglayer_from_canvas
          elif self.rbAggLayerFromBrowser.isChecked():
              new_step = self.parent.step_fc_agglayer_from_browser
          else:
              new_step = self.parent.step_fc_summary
          return new_step
docs: Find the proper step when user clicks the Next button.
  
          :returns: The step to be switched to
          :rtype: WizardStep instance or None