code: def test_link_func_logit_31():
      predictions = np.array([[[0.25, 0.5, 0.25]]])
      with pytest.raises(ValueError):
          link_func(predictions, "logit")
  
imports: import numpy
  import pytest
  from interpret.utils import link_func, inv_link
label_desc: Use image node_id 15 for calling a global function with example usage: test_link_func_logit_31() without return types