code: def after_train_iter(self, runner):
      if runner.global_step >= self.max_step:
          runner.stop = True
  
imports: from bigdl.orca.learn.pytorch.callbacks import Callback
  import math
label_desc: Use image node_id 3 for calling the MaxstepsCallback obj's underlying member method code with example usage: obj.after_train_iter(runner) without return types