code: def textn(self, buf):
      self._data = join([self._data, self.list_depth(), buf, self.endl])
  
imports: import os
  import yaml
  import re
  import doc_gen_snipets
label_desc: Use image node_id 11 for calling the MarkdownFile obj's underlying member method code with example usage: obj.textn(buf) without return types