openlayers - 从openlayers中的集群中拖动一个特征

Question

如何在图层中拖动簇？从群集中拖动特定功能后，我想从群集中删除该功能。

var strategy = new OpenLayers.Strategy.Cluster({distance:10,threshold:2});
poiLayer = new OpenLayers.Layer.Vector("poiLayer",{strategies:[strategy],styleMap:stylemap});
map.addLayer(poiLayer); 
strategy.activate();
drag = new OpenLayers.Control.DragFeature(poiLayer);
map.addControl(drag);
drag.activate();

是否可以从集群中拖动单个特征？