code: def _compilePaletteTypes(self):
      if self.version == 0 or not any(self.paletteTypes):
          return b""
      assert len(self.paletteTypes) == len(self.palettes)
      result = bytesjoin(
          [struct.pack(">I", ptype) for ptype in self.paletteTypes]
      )
      assert len(result) == 4 * len(self.palettes)
      return result
  
imports: from fontTools.misc.textTools import bytesjoin, safeEval
  from .None import DefaultTable
  import array
  from collections import namedtuple
  import struct
  import sys
label_desc: Use image node_id 8 for calling the table_C_P_A_L_ obj's underlying member method code with example usage: obj._compilePaletteTypes() and returns: result, bytes