code: def plotChIds(self, maptype=None, modout=False):
          
          if maptype is None:
              maptype = self.defaultMap
  
          polyList = self.getAllChannelsAsPolygons(maptype)
          for p in polyList:
              p.identifyModule(modout=modout)
docs: Print the channel numbers on the plotting display
  
          Note:
          ---------
          This method will behave poorly if you are plotting in
          mixed projections. Because the channel vertex polygons
          are already projected using self.defaultMap, applying
          this function when plotting in a different reference frame
          may cause trouble.