code: def timestampSinceEpoch(value):
      return int(value - epoch_diff)
  
file_path: catboost/contrib/python/fonttools/fontTools/misc/timeTools.py
imports: import os
  import time
  from datetime import datetime, timezone
  import calendar
label_desc: Use image node_id 5 for calling a global function with example usage: timestampSinceEpoch(value) and returns: int