@Test
public void testExist() {

    RowFilters.regexFilter("sometext");
    RowFilters.regexFilter("some", 0, 1, 3);
    RowFilters.regexFilter(Pattern.compile("text"), 0, 5);
    RowFilters.regexFilter(Pattern.compile("soem"));
    RowFilters.regexFilter(0, "some");
    RowFilters.regexFilter(0, "some", 1);
}