code: def escape_line_feed(strval, indent="    "):
      return strval.replace(r"\n", '\\n"\\\n' + indent + '"')
  
imports: import base64
  import json
  import os
  import re
  import sys
  import shutil
  import tempfile
  import textwrap
  import zipfile
label_desc: Use image node_id 4 for calling the _Formatting obj's underlying member method code with example usage: obj.escape_line_feed(strval, indent) and returns: strval