class_docstr: Handle to a markdown link, for easy existence test and printing
  (external links are not tested)
class_docstr_tok: ["Handle","to","a","markdown","link",",","for","easy","existence","test","and","printing","(","external","links","are","not","tested",")"]
code: def __init__(
      self, folder: Path, filepath: Path, string: str, link: str
  ) -> None:
      self._folder = folder
      self._filepath = filepath
      self._string = string
      self._link = link
  
imports: import re
  import os
  import warnings
  import platform
  import unittest
  import inspect
  import contextlib
  from pathlib import Path
  import typing
  import numpy
  from .None import errors
label_desc: Use image node_id 1 to create a new _MarkdownLink object  with example: obj = _MarkdownLink(folder, filepath, string, link)