code: def unfold(
      array: np.ndarray, piece_size: int, divisions: int
  ) -> np.ndarray:
      # (len(array),) -> (divisions, piece_size)
      return array[: piece_size * divisions].reshape(-1, piece_size)
  
imports: import numpy
  import statsmodels.api
label_desc: Use image node_id 10 for calling a global function with example usage: unfold(array, piece_size, divisions) and returns: array