@Test
public void sequenceOfWorksWhenSingleArg() throws SQLException {

    Operation a = mock(Operation.class);
    assertSame(a, CompositeOperation.sequenceOf(a));
    assertSame(a, CompositeOperation.sequenceOf(Collections.singletonList(a)));
    assertSame(a, Operations.sequenceOf(a));
    assertSame(a, Operations.sequenceOf(Collections.singletonList(a)));
}