code: def test_expm_multiply(B):
      if B.__class__.__name__[:3] != "csc":
          return
  
      npt.assert_allclose(
          spla.expm_multiply(B, np.array([1, 2])), spla.expm(B) @ [1, 2]
      )
  
imports: import pytest
  import numpy
  import numpy.testing
  import scipy.sparse
  import scipy.sparse.linalg
  from scipy._lib._util import VisibleDeprecationWarning
label_desc: Use image node_id 21 for calling a global function with example usage: test_expm_multiply(B) without return types