About EV calling

Open Source Development Extension Development
1 
package com.example;

import com.google.appinventor.components.annotations.*;
import com.google.appinventor.components.runtime.*;

@DesignerComponent(version = 1,
        description = "My First Extension",
        category = ComponentCategory.EXTENSION,
        nonVisible = true)
@SimpleObject(external = true)
public class MyExtension extends AndroidNonvisibleComponent {

    public MyExtension(ComponentContainer container) {
        super(container.$form());
    }

    @SimpleFunction(description = "Says Hello")
    public String SayHello(String name) {
        return "Hello, " + name;
    }
}
2

Welcome and congratulations!
Taifun

3

What exactly does the title mean in this case?