code: def init(
      model: Model[InT, OutT],
      X: Optional[InT] = None,
      Y: Optional[OutT] = None,
  ) -> None:
      if X is not None:
          model.layers[0].set_dim("nI", get_width(X[1]))
          model.layers[0].initialize(X=X[0])
          X = (
              model.layers[0].predict(X[0]),
              model.layers[0].predict(X[1]),
          )
      model.layers[1].initialize(X=X, Y=Y)
      model.set_dim("nI", model.layers[0].get_dim("nI"))
      model.set_dim("nO", model.layers[1].get_dim("nO"))
  
imports: from typing import Callable, Optional, Tuple, TypeVar
  from ..config import registry
  from ..model import Model
  from ..types import ArrayXd
  from ..util import get_width
label_desc: Use image node_id 3 for calling a global function with example usage: init(model, X, Y) without return types