code: def get_module_key(file_name):
      module_key = None
      if file_name[-3:] == ".cl":
          module_key = file_name[:-3]
      elif file_name[-2:] == ".h":
          module_key = file_name
  
      return module_key
  
file_path: mace/mace/python/tools/encrypt_opencl_codegen.py
imports: import argparse
  import hashlib
  import os
  import shutil
  import sys
  import jinja2
label_desc: Use image node_id 4 for calling a global function with example usage: get_module_key(file_name) and returns: module_key