code: def _is_big_endian(self):
          
          if self.endian == DataTypeMixIn.ENDIAN_NATIVE:
              return SYSTEM_ENDIAN == DataTypeMixIn.ENDIAN_BIG
  
          return self.endian in (DataTypeMixIn.ENDIAN_BIG, DataTypeMixIn.ENDIAN_NETWORK)
docs: Whether the current endian is big endian.