@Test
    void requireThatTrueChildrenOfAndAreRemoved() {
        assertSimplifiedTo(feature("a").inSet("b"), and(feature("a").inSet("b"), value(true)));
    }
@author <a href="mailto:magnarn@yahoo-inc.com">Magnar Nedland</a>
predicate-search-core/src/test/java/com/yahoo/search/predicate/optimization/BooleanSimplifierTest.java