}
protected Polygon createPolyRect(DockingPort port, Component dockable, String region) {
RegionChecker regionChecker = port.getDockingProperties().getRegionChecker();
if(regionChecker==null)
regionChecker = new DefaultRegionChecker();
Rectangle r = regionChecker.getSiblingBounds(dockable, region);
return createPolyRect(r);
}