code: def __call__(self, image, trimap):
      image = self.__to_float64(image)
      trimap = self.__to_float64(trimap)
      alpha_matte = self.alpha_estimator(image, trimap, **self.kargs)
      return alpha_matte
  
imports: import pymatting
  from paddleseg.cvlibs import manager
label_desc: Use image node_id 2 for calling the BaseMLMatting obj's underlying member method code with example usage: obj.__call__(image, trimap) and returns: alpha_matte