code: def get_variable_trace_string(v):
      sio = StringIO()
      # For backward compatibility with old trace
      tr = getattr(v.tag, "trace", [])
      if isinstance(tr, list) and len(tr) > 0:
          print(
              " \nBacktrace when that variable is created:\n", file=sio
          )
          # The isinstance is needed to handle old pickled trace
          if isinstance(tr[0], tuple):
              traceback.print_list(v.tag.trace, sio)
          else:
              # Print separate message for each element in the list of
              # backtraces
              for idx, subtr in enumerate(tr):
                  if len(tr) > 1:
                      print(f"trace {int(idx)}", file=sio)
                  traceback.print_list(subtr, sio)
      return sio.getvalue()
  
imports: import linecache
  import sys
  import traceback
  from abc import ABCMeta
  from collections.abc import Sequence
  from io import StringIO
  from typing import TYPE_CHECKING, Any, Optional, TypeVar, Union
label_desc: Use image node_id 3 for calling a global function with example usage: get_variable_trace_string(v) and returns: sio