Here is an example of a class using StatusUtil in Logback:

import ch.qos.logback.core.status.StatusManager;
import ch.qos.logback.core.status.StatusUtil;

public class MyClass {

    private StatusManager statusManager;
    private StatusUtil statusUtil;

    public MyClass(StatusManager statusManager) {
        this.statusManager = statusManager;
        this.statusUtil = new StatusUtil(statusManager);
    }

    public void doSomething() {
        if (statusUtil.hasXMLParsingErrors(statusManager)) {
            // code to handle errors
        } else {
            // code to continue processing
        }
    }
}

This class is an example of a custom class that uses StatusUtil in Logback. StatusUtil is a utility class that provides several methods for analyzing the status of a StatusManager object. In this example, it is used to check if there are any XML parsing errors in the status manager.

The StatusManager object is passed to the constructor of the class, and the StatusUtil object is created by passing the StatusManager object to its constructor. The doSomething method is an example of a custom method that uses the hasXMLParsingErrors method of the StatusUtil class to check if there are any XML parsing errors in the status manager. If there are errors, it will handle them, if not it will continue processing.

It is important to note that StatusUtil is a utility class that provides several methods for analyzing the status of a StatusManager object. Its methods include methods to check for specific types of status events, such as errors or warnings, and methods to filter status events by level, origin, and message. The StatusUtil class can be used to programmatically analyze the status of the logging system and take appropriate action based on the results.