How to prevent repeated initialization?

[Fei-Wang]

model = dict(
    type='HuggingFaceClassifier',
    model_name='microsoft/resnet-50',
    pretrained=True,
    num_labels=10,
    ignore_mismatched_sizes=True,
)

Excuse me, how does mmcls prevent huggingface model from being repeatedly initialized by mmengine, I have not seen the corresponding code.

[Fei-Wang]

By the way, I'm talking about the dev1.x branch. And TIMMBackbone in backbones has similar problem, can someone help me?