code: def save_caller(element):
      """Save call stack in probing event"""
  
      element["stack"] = get_full_stack_desc()
  
      return element
  
imports: import argparse
  import contextlib
  import multiprocessing
  import subprocess
  import sys
  import time
  from collections import defaultdict, namedtuple
  import bson
  import numpy
  from ptera import probing
  from orion.client import build_experiment
  from orion.client.runner import Runner
  from orion.core.io.database.pickleddb import PickledDB
  from orion.testing import OrionState
label_desc: Use image node_id 14 for calling a global function with example usage: save_caller(element) and returns: element