src/transformers/models/van/modeling_van.py/VanModel/__init__
class VanModel:    def __init__(self, config):
        super().__init__(config)
        self.config = config
        self.encoder = VanEncoder(config)
        # final layernorm layer
        self.layernorm = nn.LayerNorm(config.hidden_sizes[-1], eps=config.layer_norm_eps)
        # Initialize weights and apply final processing
        self.post_init()