code: def set_prewarp(self, prewarp):
          
          prewarp = _convert_to_charp(prewarp)
          self._set_prewarp_func(self.alpr_pointer, prewarp)
docs: Updates the prewarp configuration used to skew images in OpenALPR before
          processing.
  
          :param prewarp: A unicode/ascii string (Python 2/3) or bytes array (Python 3)
          :return: None