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 exists(self) -> bool:
      if self._link.startswith("http"):  # consider it exists
          return True
      fullpath = self._folder / self._filepath.parent / self._link
      return fullpath.exists()
  
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 2 for calling the _MarkdownLink obj's underlying member method code with example usage: obj.exists() and returns: fullpath, True