code: def _trigger_step(self):
      self._op.run()
  
file_path: tensorpack/examples/GAN/WGAN.py
imports: import tensorflow
  from tensorpack import *
  from tensorpack.tfutils.summary import add_moving_summary
  import DCGAN
  from GAN import SeparateGANTrainer
label_desc: Use image node_id 2 for calling the ClipCallback obj's underlying member method code with example usage: obj._trigger_step() without return types