code: def add(self, lines):
      if lines is None:
          return
      if isinstance(lines, str):
          lines = textwrap.dedent(lines).strip().split("\n")
      indent = self.INDENT * self.level
      for line in lines:
          self.append(indent + line)
  
imports: import os
  import inspect
  import textwrap
label_desc: Use image node_id 2 for calling the Lines obj's underlying member method code with example usage: obj.add(lines) without return types