code: def __init__(self, params):
      self.params = params
      self.learners = []
      self.learner = None  # current learner
      self.name = "callback"
  
file_path: mljar-supervised/supervised/callbacks/callback.py
label_desc: Use image node_id 1 to create a new Callback object from inherited base classes: object with example: obj = Callback(params)