 	import mx.core.Application;
 	import mx.core.IToolTip;
 	import mx.managers.ToolTipManager;
+	import mx.utils.ObjectUtil;
 	
 	import weave.Weave;
 	import weave.api.data.IAttributeColumn;

	import weave.core.LinkableHashMap;
	import weave.primitives.Bounds2D;
	import weave.visualization.layers.InteractiveVisualization;
	import weave.visualization.layers.SimpleInteractiveVisualization;
	
	/**
	 * ProbeTextManager

			// calculate y pos depending on toolTipAbove setting
			if (toolTipAbove)
			{
				y = stageY - (probeToolTip.height + 2 * margin);
				if(yAxisToolTip != null)
					y = yAxisToolTip.y - margin - probeToolTip.height ;
			}
