docstr: Return the font name, e.g., 'Times-Roman'.
code: def get_fontname(self):
      """Return the font name, e.g., 'Times-Roman'."""
      return self._header[b"FontName"]
  
imports: from collections import namedtuple
  import logging
  import re
  from ._mathtext_data import uni2type1
label_desc: Use image node_id 12 for calling the AFM obj's underlying member method code with example usage: obj.get_fontname() and returns: self