code: public synchronized Class<?> getControllerClassForName(String name) {
          Assert.requireNonBlank(name, "name");
          Class<?> foundClass = controllersClasses.get(name);
          if(foundClass == null) {
              throw new IllegalArgumentException("Can't find controller type with name " + name);
          }
          return foundClass;
      }
docs: Returns the controller class that is registered for the given name. For more information about controller
  classes and the name definition see {@link RemotingController}
  @param name the name
  @return the controller class