text: """The :mod:`pyts.multivariate.utils` module includes utility tools."""
  
  # Author: Johann Faouzi <johann.faouzi@gmail.com>
  # License: BSD-3-Clause
  
  from sklearn.utils import check_array
  
  
  def check_3d_array(X):
      """Check that the input is a three-dimensional arrayself.
  
      Parameters
      ----------
      X : array-like
          Input data
  
      """
      X = check_array(X, ensure_2d=False, allow_nd=True)
      if X.ndim != 3:
          raise ValueError("X must be 3-dimensional (got {0}).".format(X.ndim))
      return X
  