src/transformers/models/nystromformer/modeling_nystromformer.py/NystromformerModel/__init__
class NystromformerModel:    def __init__(self, config):
        super().__init__(config)
        self.config = config

        self.embeddings = NystromformerEmbeddings(config)
        self.encoder = NystromformerEncoder(config)

        # Initialize weights and apply final processing
        self.post_init()