code: def warn_missing_suffix(df):
      message = ""
      for field in ["prompt", "completion"]:
          if not get_common_suffix(df[field]):
              message += f"TODO: {field} does not have common suffix, please add one (e.g. \\n) at the end of {field}_template\n"
      return message if message else None
  
imports: import argparse
  import math
  import os
  import pathlib
  from collections import Counter
  import numpy
  import pandas
label_desc: Use image node_id 8 for calling a global function with example usage: warn_missing_suffix(df) and returns: unknown