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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def transform(self, X, y=None):
 """ Generate a set of multi-resolution ANTsImage types Arguments --------- X : ANTsImage image to transform y : ANTsImage (optional) another image to transform Example ------- """

        insuffix = X._libsuffix
        multires_fn = utils.get_lib_fn('multiResolutionAntsImage%s' % (insuffix))
        casted_ptrs = multires_fn(X.pointer, self.levels)
        
        imgs = []
        for casted_ptr in casted_ptrs:
            img = iio.ANTsImage(pixeltype=X.pixeltype, dimension=X.dimension,
                                components=X.components, pointer=casted_ptr)
            if self.keep_shape:
                img = img.resample_image_to_target(X)
            imgs.append(img)

        return imgs