code: def start(self):
      """Starts ingesting data.
  
      This may start a background thread or process, and will return
      once communication with that task is established. It won't block
      forever as data is reloaded.
  
      Must only be called once.
      """
      pass
  
imports: import abc
label_desc: Use image node_id 2 for calling the DataIngester obj's underlying member method code with example usage: obj.start() without return types