Working with group

Source code:
		
fire.require(
	function(){
		var output = $("#output > pre > code");
		
		output.append("Creating Group with Spatial Index...<br/>");
		
		var group = new fire.gear.geom.Group({type: fire.gear.geom.SpatialIndexType.QuadTree});
		
		var pm = new fire.gear.geom.PrecisionModel(fire.gear.geom.PrecisionModel.FLOATING);
		var factory = new fire.gear.geom.GeometryFactory(pm);
		var c1  = new fire.gear.geom.Coordinate(8, 43);
		var pt1 = factory.createPoint(c1);
		
		group.include(pt1);
		output.append("Now group size is: " + group.size() + "<br/>");
		
		var c2  = new fire.gear.geom.Coordinate(8, 44);
		var c3  = new fire.gear.geom.Coordinate(9, 44);
		var c4  = new fire.gear.geom.Coordinate(9, 43);
		var ls = factory.createLineString([c2,c3,c4]);
		
		group.include(ls);
		output.append("Now group size is: " + group.size() + "<br/>");
				
	} , {
		 modules : [fire.Modules.GEAR]
		,mode : fire.Mode.BUILD
		,otherScripts: []
		,relative: "../lib/fire/"
	}	
	
);