code: def hhea(self):
      r = {}
      d = self.tables["hhea"]
      r["Ascender"], r["Descender"], r["LineGap"] = struct.unpack(
          ">hhh", d[4:10]
      )
      return r
  
file_path: matplotlib/tools/subset.py
imports: import getopt
  import os
  import struct
  import subprocess
  import sys
  import fontforge
label_desc: Use image node_id 2 for calling the Sfnt obj's underlying member method code with example usage: obj.hhea() and returns: r