code: def leaky_relu(x, name):
      half_alpha = 0.01
      return (0.5 + half_alpha) * x + (0.5 - half_alpha) * abs(x)
  
file_path: NiftyNet/niftynet/layer/activation.py
imports: from __future__ import absolute_import, print_function
  import tensorflow
  from niftynet.layer.base_layer import TrainableLayer
  from niftynet.utilities.util_common import look_up_operations
label_desc: Use image node_id 3 for calling a global function with example usage: leaky_relu(x, name) and returns: unknown