base\Application $bootstrap

List of components that should be run during the application bootstrapping process.

Each component may be specified in one of the following formats:

• an application component ID as specified via $components.
• a module ID as specified via $modules.
• a class name.
• a configuration array.

During the bootstrapping process, each component will be instantiated. If the component class implements yii\base\BootstrapInterface, its bootstrap() method will be also be called.