Answer by Marko for Why should Java 8's Optional not be used in arguments

In case you want to have an Optional argument in your function rather do it using another functional interface. For example:

void doSomething(Supplier<Optional<String>> urlSupplier) {    urlSupplier.get()                .filter(StringUtils::isNotBlank)                .isPresent((url) -> System.out.println(url));}

You can use Function instead of Supplier it is up to you. Then you can just call it. For example:

void myMethod() {    doSomething(() -> methodToGetUrlAsOptional());}