code: def add_and_set_learner(self, learner):
      self.learners += [learner]
      self.learner = learner
  
file_path: mljar-supervised/supervised/callbacks/callback.py
label_desc: Use image node_id 2 for calling the Callback obj's underlying member method code with example usage: obj.add_and_set_learner(learner) without return types