lombok @ExtensionMethod sample3.

gistfile1.java

import lombok.experimental.ExtensionMethod;

@ExtensionMethod({ Extensions1.class, Extensions2.class })
public class Main {
    public static void main(String[] args) {
        System.out.println("test".addedMethod()); // => test added method 2
    }
}

class Extensions1 {
    public static String addedMethod(int value) {
        return value + " added method 1";
    }
}

class Extensions2 {
    public static String addedMethod(String value) {
        return value + " added method 2";
    }
}