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
{
	private final DeferredCache dc;
	private final int iInstruction;
	private ArrayList alEvents = null;
	private PrimitiveRenderEvent pre = null;
	/**
	 * The constructor.
	 */
	public WrappedInstruction( DeferredCache dc, ArrayList alEvents,
			int iInstruction )
	{
		this.dc = dc;
		this.alEvents = alEvents;
		this.iInstruction = iInstruction;
	}
	/**
	 * The constructor.
	 */
	public WrappedInstruction( DeferredCache dc, PrimitiveRenderEvent pre,
			int iInstruction )
	{
		this.dc = dc;
		this.pre = pre;
		this.iInstruction = iInstruction;
	}