@Test
    void requireThatNotOfNotIsRemoved() {
        assertSimplified(feature("a").inSet("b"), not(not(feature("a").inSet("b"))));
        assertSimplified(feature("a").inSet("b"), not(feature("a").notInSet("b")));
        assertSimplified(feature("a").notInSet("b"), not(not(feature("a").notInSet("b"))));
    }
@author <a href="mailto:magnarn@yahoo-inc.com">Magnar Nedland</a>
predicate-search-core/src/test/java/com/yahoo/search/predicate/optimization/AndOrSimplifierTest.java