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

import ch.qos.logback.core.Context;
import ch.qos.logback.core.joran.spi.JoranException;
import ch.qos.logback.core.util.ContextUtil;
import org.slf4j.LoggerFactory;

public class MyClass {

    public void doSomething() {
        Context context = (Context) LoggerFactory.getILoggerFactory();
        ContextUtil contextUtil = new ContextUtil(context);
        try {
            contextUtil.reset();
            // do something with the context
        } catch (JoranException e) {
            // handle exception
        }
    }
}

This class is an example of using ContextUtil in Logback. ContextUtil is a utility class that provides methods to perform operations on Context objects, such as resetting the context, adding or removing parameters, and more.

In this example, the doSomething method obtains the context object by calling LoggerFactory.getILoggerFactory() and creates an instance of ContextUtil by passing the context object to its constructor. Then it calls reset() method to reset the context.

It is important to note that ContextUtil is a utility class that provides methods to perform operations on Context objects. It can be used to reset the context, add or remove parameters, and more.

It is important to handle the JoranException that might be thrown by the reset() method.

The reset() method when called, it remove all previously stored data from the context and reset it to its default state. It can be useful when you want to clear the context and start over with a fresh configuration.