docstr: Return the xheight as float
docstr_tok: ["Return","the","xheight","as","float"]
code: def get_xheight(self):
      "Return the xheight as float"
      return self._header["XHeight"]
  
imports: import sys, os, re
  from _mathtext_data import uni2type1
label_desc: Use image node_id 18 for calling the AFM obj's underlying member method code with example usage: obj.get_xheight() and returns: self