code: def generate_string_combinations(*lists):
      combinations = list(itertools.product(*lists))
      combinations = [
          "".join(combination) for combination in combinations
      ]
      return combinations
  
file_path: vowpal_wabbit/python/tests/e2e_v2/test_helper.py
imports: import json
  import importlib
  import os
  import itertools
  import inspect
  import shutil
label_desc: Use image node_id 5 for calling a global function with example usage: generate_string_combinations() and returns: combinations