def METHOD_NAME():
    freqs = fftfreq(9, d=1.0 / 9).reshape(3, 3)
    t = ifftshift(fftshift(freqs))
    assert t.dtype is not None
    expect_dtype = np.fft.ifftshift(
        np.fft.fftshift(np.fft.fftfreq(9, d=1.0 / 9).reshape(3, 3))
    ).dtype
    assert t.dtype == expect_dtype