code: def watch(tape, tensor):
      """Marks this tensor to be watched by the given tape."""
      pywrap_tfe.TFE_Py_TapeWatch(tape._tape, tensor)
  
file_path: tensorflow/tensorflow/python/eager/tape.py
imports: from tensorflow.python import pywrap_tfe
label_desc: Use image node_id 3 for calling a global function with example usage: watch(tape, tensor) without return types