PicoCLI :如何将@ArgGroup用于CommandLine.Command方法

import picocli.CommandLine;
import picocli.CommandLine.ArgGroup;
import picocli.CommandLine.Command;
import picocli.CommandLine.Option;

@Command(name = "myapp", description = "My awesome application")
public class MyApp implements Runnable {

    @ArgGroup(exclusive = false, multiplicity = "1")
    MyOptions myOptions;

    static class MyOptions {
        @Option(names = {"-a", "--optionA"}, description = "Option A")
        String optionA;

        @Option(names = {"-b", "--optionB"}, description = "Option B")
        String optionB;
    }

    public void run() {
        // 在这里编写命令行应用程序的逻辑
        System.out.println("Option A: " + myOptions.optionA);
        System.out.println("Option B: " + myOptions.optionB);
    }

    public static void main(String[] args) {
        CommandLine.run(new MyApp(), args);
    }
}