Private final Map
Key public B put (K, V value) {
This. The map. The put (key, value);
Return _this ();
}
Public Map
Return this. The map;
}
@ SuppressWarnings (" unchecked ")
Protected final _this B () {//NOSONAR the underscore
This return (B);
}
}
How did he do it extends itself, create the class object need how? New MapBuilder