class_docstr: LineIterator with ``.source`` attribute, that it returns for ``str()``.
docstr: The DOT source code as string.
code: def __str__(self) -> str:
      """The DOT source code as string."""
      return self.source
  
file_path: graphviz/graphviz/base.py
imports: import typing
  from .None import copying
label_desc: Use image node_id 2 for calling the Base obj's underlying member method code with example usage: obj.__str__() and returns: self