code: def monitor_activation(tensor):
      tf.add_to_collection(tf.GraphKeys.ACTIVATIONS, tensor)
  
file_path: tflearn/tflearn/summaries.py
imports: from __future__ import division, print_function, absolute_import
  import tensorflow.compat.v1
  from tensorflow.core.framework import summary_pb2
  from .utils import format_scope_name
label_desc: Use image node_id 1 for calling a global function with example usage: monitor_activation(tensor) without return types