Object-oriented SGScript - inheritance

var printerIface =
{
    print_stdout = function( text ){ print( text ); },
};
var postfixPrinterIface =
{
    print = function( this, text ){ this.print_stdout( text $ this.postfix ); },
    postfix = '[postfix]',
};
var questionPrinter = class( { postfix = '?' }, class( postfixPrinterIface, printerIface ) );
questionPrinter.print( "wat" );