Android RxJava zip two observables

ZipObservables.java

// Say you have two observables (Bar and Baz) you want to combine into a single output (Foo)

public Observable<Foo> combineObservables(Observable<Bar> barObservable, Observable<Baz> bazObservable) {
    return Observable.zip(
        barObservable,
        bazObservable,
        new Func2<Bar, Baz, Foo>() {
           
            @Override
            public Foo call(Bar bar, Baz baz) {
                return new Foo(bar, baz)   
            }
        }
    };
}