package edu.vserver.exercises.math; import java.util.ArrayList; import com.vaadin.ui.Button; import com.vaadin.ui.HorizontalLayout; import edu.vserver.exercises.math.essentials.layout.TimeStampHandler; public class StubUIProducer implements MathSubmissionUI { @Override public Button getTimeLineButton(TimeStampHandler currhandler) { return new Button(); } @Override public HorizontalLayout getChartContainer( ArrayList<TimeStampHandler> handlers, Double[] timesPerTask, int correctAnswers, int i) { return new HorizontalLayout(); } }