What is the correct way to include multiple classes in my own Yii2 component?

Question

Yii

Good afternoon!
Recently, I encountered the fact that the connection of classes of my own component was implemented with failure and the compiler displayed this message:

As you can see, the compiler refers to the fact that I specified the method of one of several classes bound to the component and not only in this section of code .
Is it possible to use more than one class in a component file? The code for the controller and my components is available in the comments to the question.

Answer 1

How can you be a programmer without perceiving the information that the system tells you?

Yii::$app