code example error

[rvadym]

http://book.agiletoolkit.org/agiletoolkit-overview/view.html
https://github.com/atk4/book/blob/master/en/agiletoolkit-overview/view.rst#helloworld-view

$this->add('HelloWorld', ['message' => 'Hello, Agile Toolkit']);

This example will not work because $message is private.

private $message = 'Hello, World';