def METHOD_NAME(self):
    def f(m):
        c = complex_from_polar(abs(m[0]), m[1])
        return 0.5 * real(c) + 0.9 * imag(c)
    rng = np.random.default_rng(9333)
    mval = np.asarray(rng.standard_normal((2, 5)))
    utt.verify_grad(f, [mval])