def METHOD_NAME():
    q0, q1 = cirq.LineQubit.range(2)
    s00 = cirq.KET_ZERO(q0) * cirq.KET_ZERO(q1)
    np.testing.assert_equal(s00.state_vector(), [1, 0, 0, 0])
    np.testing.assert_equal(s00.state_vector(qubit_order=(q1, q0)), [1, 0, 0, 0])
    s01 = cirq.KET_ZERO(q0) * cirq.KET_ONE(q1)
    np.testing.assert_equal(s01.state_vector(), [0, 1, 0, 0])
    np.testing.assert_equal(s01.state_vector(qubit_order=(q1, q0)), [0, 0, 1, 0])