class_docstr: Container holding a list of callbacks.
code: def append(self, callback):
      self.callbacks.append(callback)
  
file_path: pywick/pywick/callbacks/CallbackContainer.py
imports: import time
  import datetime
label_desc: Use image node_id 2 for calling the CallbackContainer obj's underlying member method code with example usage: obj.append(callback) without return types