RedBeanPHP\Facade::ext PHP Method

    public static function ext($pluginName, $callable)
    {
        if (!ctype_alnum($pluginName)) {
            throw new RedException('Plugin name may only contain alphanumeric characters.');
        }
        self::$plugins[$pluginName] = $callable;
    }

 /**
  * Test if we can dynamically extend the R-facade.
  * 
  * @return void
  */
 public function testDynamicPlugins()
 {
     testpack('Test dynamic plugins');
     //basic behaviour
     R::ext('makeTea', function () {
         return 'sorry cant do that!';
     });
     asrt(R::makeTea(), 'sorry cant do that!');
     //with parameters
     R::ext('multiply', function ($a, $b) {
         return $a * $b;
     });
     asrt(R::multiply(3, 4), 12);
     //can we call R inside?
     R::ext('singVersion', function () {
         return R::getVersion() . ' lalala !';
     });
     asrt(R::singVersion(), R::getVersion() . ' lalala !');
     //should also work with Facade
     asrt(Facade::singVersion(), R::getVersion() . ' lalala !');
     //test error handling
     try {
         R::ext('---', function () {
         });
         fail();
     } catch (RedException $e) {
         asrt($e->getMessage(), 'Plugin name may only contain alphanumeric characters.');
     }
     try {
         R::__callStatic('---', function () {
         });
         fail();
     } catch (RedException $e) {
         asrt($e->getMessage(), 'Plugin name may only contain alphanumeric characters.');
     }
     try {
         R::invalidMethod();
         fail();
     } catch (RedException $e) {
         asrt($e->getMessage(), 'Plugin \'invalidMethod\' does not exist, add this plugin using: R::ext(\'invalidMethod\')');
     }
 }