Bug 188283 Bubbles should be z-sorted by size in Bubble charts
Biggest bubbles should be drawn first so that there is no small bubble hidden by a bigger one.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/event/WrappedInstruction.java
/***********************************************************************
 * Copyright (c) 2004, 2007 Actuate Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * Actuate Corporation - initial API and implementation
 ***********************************************************************/
package org.eclipse.birt.chart.event;
import java.util.ArrayList;
import org.eclipse.birt.chart.engine.i18n.Messages;
import org.eclipse.birt.chart.exception.ChartException;
import org.eclipse.birt.chart.model.attribute.Bounds;
import org.eclipse.birt.chart.model.attribute.impl.BoundsImpl;
import org.eclipse.birt.chart.render.DeferredCache;
import com.ibm.icu.util.ULocale;
/**
 * This class wraps different types of rendering events. It could stand for one
 * or a list of events.
 */
public final class WrappedInstruction implements Comparable