code: def test_gammainc(n, t, gamma_ref):
      """Test that the lower incomplete Gamma function is computed correctly."""
      gamma = fn.gammainc(n, t)
  
      assert np.allclose(gamma, gamma_ref)
  
imports: import autoray
  import numpy
  import pytest
  import scipy
  from autoray import numpy
  from pennylane import math
  from pennylane import numpy
  from pennylane import grad
label_desc: Use image node_id 8 for calling a global function with example usage: test_gammainc(n, t, gamma_ref) without return types