I can't find callbacks on pl.Trainer()
I saw in Documentation that show ' argument', but when a run I got a error
The same for 'num_tpu_core's argument
TypeError                                 Traceback (most recent call last)
<ipython-input-23-62ad7a703918> in <module>()
      2 
      3 model = LightningBirdsClassifier(num_classes=200)
----> 4 trainer = pl.Trainer(gpus=-1, max_nb_epochs=120, callbacks=[ProgressBar()])
      5 
      6 trainer.fit(model)

TypeError: __init__() got an unexpected keyword argument 'callbacks'