src/transformers/models/maskformer/modeling_maskformer.py/MaskFormerModel/__init__
class MaskFormerModel:    def __init__(self, config: MaskFormerConfig):
        super().__init__(config)
        self.pixel_level_module = MaskFormerPixelLevelModule(config)
        self.transformer_module = MaskFormerTransformerModule(
            in_features=self.pixel_level_module.encoder.channels[-1], config=config
        )

        self.post_init()