code: def toXML(self, xmlWriter, ttFont):
      xmlWriter.comment(
          "note that the Digital Signature will be invalid after recompilation!"
      )
      xmlWriter.newline()
      xmlWriter.simpletag(
          "tableHeader",
          version=self.ulVersion,
          numSigs=self.usNumSigs,
          flag="0x%X" % self.usFlag,
      )
      for sigrec in self.signatureRecords:
          xmlWriter.newline()
          sigrec.toXML(xmlWriter, ttFont)
      xmlWriter.newline()
  
file_path: catboost/contrib/python/fonttools/fontTools/ttLib/tables/D_S_I_G_.py
imports: from fontTools.misc.textTools import bytesjoin, strjoin, tobytes, tostr, safeEval
  from fontTools.misc import sstruct
  from .None import DefaultTable
  import base64
label_desc: Use image node_id 3 for calling the table_D_S_I_G_ obj's underlying member method code with example usage: obj.toXML(xmlWriter, ttFont) without return types