public static String hashForStringArray(String[] stringData) {
        checkNotNull(stringData);

        return computeHashFor(stringData);
    }
@Test
    public void hashForStringArrayAcceptsNull() {
        String[] arrayWithNullValue = new String[]{"a", "b", null};

        assertDoesNotThrow(() -> hashForStringArray(arrayWithNullValue));
    }