public T get() {
        if (value == null) {
            throw new NoSuchElementException("No value present");
        }
        return value;
    }
If a value is present in this {@code Optional}, returns the value,
otherwise throws {@code NoSuchElementException}.

@return the non-null value held by this {@code Optional}
@throws NoSuchElementException if there is no value present
@see Optional#isPresent()
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/Optional.java