code: def _expand_window_floats(
      model: Model[InT, InT], X: Floats2d
  ) -> Tuple[Floats2d, Callable]:
      nW = model.attrs["window_size"]
      if len(X) > 0:
          Y = model.ops.seq2col(X, nW)
      else:
          assert len(X) == 0
          Y = model.ops.tile(X, (nW * 2) + 1)
  
      def backprop(dY: Floats2d) -> Floats2d:
          return model.ops.backprop_seq2col(dY, nW)
  
      return Y, backprop
  
imports: from typing import Callable, Tuple, TypeVar, Union, cast
  from ..config import registry
  from ..model import Model
  from ..types import Floats2d, Ragged
label_desc: Use image node_id 3 for calling a global function with example usage: _expand_window_floats(model, X) and returns: Y,  backprop, model