This code was generated by the MethodTable class by looping through the class methods and reading the signature and JavaDoc of each method. Read more about it in the amfphp docs.
When deploying your application on a webserver it's better to have a hard-coded methodTable for faster performance. You can copy/paste this code in the constructor of your service class, or, provided you have 777 permissions in /services, click the 'save' link, and write include("config.methodTable.php"); in the constructor.