code: def get_title(self):
          
          w = self.arrangement.get_active_window()
  
          if w and w.active_process:
              title = w.active_process.screen.title
          else:
              title = ''
  
          if title:
              return '%s - Pymux' % (title, )
          else:
              return 'Pymux'
docs: The title to be displayed in the titlebar of the terminal.