Add Self type hint to ModelMixin's from_pretrained

Author: hlky

src/diffusers/models/modeling_utils.py

@@ -31,6 +31,7 @@
 from huggingface_hub import DDUFEntry, create_repo, split_torch_state_dict_into_shards
 from huggingface_hub.utils import validate_hf_hub_args
 from torch import Tensor, nn
+from typing_extensions import Self
 
 from .. import __version__
 from ..hooks import apply_layerwise_casting
@@ -605,7 +606,7 @@ def dequantize(self):
 
     @classmethod
     @validate_hf_hub_args
-    def from_pretrained(cls, pretrained_model_name_or_path: Optional[Union[str, os.PathLike]], **kwargs):
+    def from_pretrained(cls, pretrained_model_name_or_path: Optional[Union[str, os.PathLike]], **kwargs) -> Self:
         r"""
         Instantiate a pretrained PyTorch model from a pretrained model configuration.