Here is an example of how the BasicStatusManager class from the logback library can be used:

import ch.qos.logback.core.status.BasicStatusManager;
import ch.qos.logback.core.status.Status;
import ch.qos.logback.core.status.InfoStatus;

public class MyClass {
    public static void main(String[] args) {
        BasicStatusManager statusManager = new BasicStatusManager();
        statusManager.add(new InfoStatus("This is an example status message", MyClass.class));
        Status status = statusManager.getHighestLevelStatus();
        System.out.println("Highest level status: " + status.getLevel());
        System.out.println("Status message: " + status.getMessage());
    }
}

In this example, MyClass uses an instance of BasicStatusManager to manage the logback status messages. The add method is used to add a new status message represented by an InfoStatus object. The getHighestLevelStatus method is used to obtain the highest level status message, which is the one with the highest severity level among all the status messages. The properties of the status message such as level and message can be accessed through the getLevel() and getMessage() methods respectively.

You can also use getCopyOfStatusList to get a copy of all the status messages.

List<Status> statusList = statusManager.getCopyOfStatusList();

You can also use clear to clear all the status messages.

statusManager.clear();

Please note that BasicStatusManager is a utility class and it does not have any constructor.