Problem with JSVGCanvas class (getting an UpdateManager)

HERE IS MY FILE

import org.apache.batik.swing.*;
import org.apache.batik.bridge.*;

public class Main {

    public static void main(String[] args) {
        JSVGCanvas canvas = new JSVGCanvas();
        UpdateManager um = canvas.getUpdateManager();
        System.out.println(um);
    }

}:

WHAT DO I NEED TO DO SO THE VARIABLE um IS NOT NULL?