Method equiv

src/jvm/clojure/lang/PersistentTreeSet.java:53–59

(Object obj)

}

public boolean equiv(Object obj){
    try {
        return super.equiv(obj);
    } catch (ClassCastException e) {
        return false;
    }
}

public IPersistentSet disjoin(Object key) {
	if(contains(key))