About these two fragments:

public interface OptionValueTuple<Option,Value> {
        Option getOption();
        Value getValue();
    }

Option can be of any type, in particular it could be represented as

• an enum value
• a Class object in particular an annotation class object
• a String

How can I implement that interface but change the return type of getOption() to something different?
I guess you mean my custom OptionValueTuple should return a custom MultiOption ?