code: def get_sizeof_descriptor_table(version="Denali"):
      
      if version == "Denali":
          return sizeof(DescriptorTableDenali)
      elif version == "Spec20":
          return sizeof(DescriptorTableSpec20)
      elif version == "Spec12":
          return 0
      else:
          raise RuntimeError("Error version!")
docs: Get sizeof DescriptorTable