code: def get_xcom_arg_class():
      try:
          from airflow import XComArg
      except ImportError:
          return None
      return XComArg
  
imports: import hashlib
  import json
  import sys
  import platform
  from collections import defaultdict
  from datetime import datetime, timedelta
label_desc: Use image node_id 7 for calling a global function with example usage: get_xcom_arg_class() and returns: XComArg, None