docstr: Get the bounding box (ink) height of character *c* (space is 0).
code: def get_height_char(self, c, isord=False):
      """Get the bounding box (ink) height of character *c* (space is 0)."""
      if not isord:
          c = ord(c)
      return self._metrics[c].bbox[-1]
  
imports: from collections import namedtuple
  import logging
  import re
  from ._mathtext_data import uni2type1
label_desc: Use image node_id 9 for calling the AFM obj's underlying member method code with example usage: obj.get_height_char(c, isord) and returns: self