docstr: Get the width of the character from the character metric WX field.
code: def get_width_char(self, c, isord=False):
      """
      Get the width of the character from the character metric WX field.
      """
      if not isord:
          c = ord(c)
      return self._metrics[c].width
  
imports: from collections import namedtuple
  import logging
  import re
  from ._mathtext_data import uni2type1
label_desc: Use image node_id 7 for calling the AFM obj's underlying member method code with example usage: obj.get_width_char(c, isord) and returns: self