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

import ch.qos.logback.core.status.StatusManager;
import ch.qos.logback.core.util.FileToBufferUtil;

public class MyClass {

    private StatusManager statusManager;

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

    public void doSomething(String filePath) {
        byte[] buffer = FileToBufferUtil.fileToByteArray(filePath, statusManager);
        // use buffer
    }
}

This class is an example of using FileToBufferUtil in Logback. FileToBufferUtil is a utility class that provides a method fileToByteArray(String filePath, StatusManager statusManager) which is used to read the content of a file and return it as a byte array.

In this example, MyClass has a doSomething method that takes in a file path and creates a byte array by calling FileToBufferUtil.fileToByteArray(filePath, statusManager). The statusManager object is passed in the constructor, and it's used to log any errors that might occur while reading the file.

It is important to note that FileToBufferUtil is a utility class that provides a way to read the content of a file and return it as a byte array. The fileToByteArray method takes two arguments: the file path and a StatusManager object, which is used to log any errors that might occur while reading the file. The FileToBufferUtil class can be useful when you need to read the content of a file and use it as a byte array.