src/transformers/models/maskformer/modeling_maskformer.py/MaskFormerHungarianMatcher/__repr__
class MaskFormerHungarianMatcher:    def __repr__(self):
        head = "Matcher " + self.__class__.__name__
        body = [
            f"cost_class: {self.cost_class}",
            f"cost_mask: {self.cost_mask}",
            f"cost_dice: {self.cost_dice}",
        ]
        _repr_indent = 4
        lines = [head] + [" " * _repr_indent + line for line in body]
        return "\n".join(lines)