code: def toXML(self, writer, ttFont):
      writer.comment(
          "Lengths and number of entries in this table will be recalculated by the compiler"
      )
      writer.newline()
      formatstring, names, fixes = sstruct.getformat(METAHeaderFormat)
      for name in names:
          value = getattr(self, name)
          writer.simpletag(name, value=value)
          writer.newline()
      for glyphRec in self.glyphRecords:
          glyphRec.toXML(writer, ttFont)
  
imports: from fontTools.misc import sstruct
  from fontTools.misc.textTools import byteord, safeEval
  from .None import DefaultTable
  import pdb
  import struct
label_desc: Use image node_id 3 for calling the table_M_E_T_A_ obj's underlying member method code with example usage: obj.toXML(writer, ttFont) without return types