code: def add(self, channel_name, entry):
          
          if channel_name:
              if channel_name not in self:
                  self[channel_name] = [entry]
              else:
                  self[channel_name].append(entry)
  
              if "\\" in channel_name:
                  channel_name = channel_name.split("\\")[0]
  
                  if channel_name not in self:
                      self[channel_name] = [entry]
                  else:
                      self[channel_name].append(entry)
docs: add name to channels database and check if it contains a source
          path
  
          Parameters
          ----------
          channel_name : str
              name that needs to be added to the database
          entry : tuple
              (group index, channel index) pair