Operation with nested optionals

ColourCount.java

private abstract class Counter {
    abstract Optional<Integer> colourCount();
}
private abstract Optional<Counter> fetchThisMonthCounter();
private abstract Optional<Counter> fetchPreviousMonthCounter();
// ************ blah blah blah
// ...
public Optional<Integer> totalColourCount() {
    
    Optional<Counter> thisMonth = fetchThisMonthCounter();
    Optional<Counter> previousMonth = fetchPreviousMonthCounter();
                                        
    if(thisMonth.isPresent() && thisMonth.get().colourCount().isPresent()
        && previousMonth.isPresent() && previousMonth.get().colourCount().isPresent()) {
    
        Integer colour1 = thisMonth.get().colourCount().get();
        Integer colour2 = previousMonth.get().colourCount().get();
        return Optional.of(colour1 + colour2);
    }
    
    return Optional.empty();
}