code: function () {
  		var series = this,
  			graphPath = [],
  			segmentPath,
  			singlePoints = []; // used in drawTracker
  
  		// Divide into segments and build graph and area paths
  		each(series.segments, function (segment) {
  			
  			segmentPath = series.getSegmentPath(segment);
  			
  			// add the segment to the graph, or a single point for tracking
  			if (segment.length > 1) {
  				graphPath = graphPath.concat(segmentPath);
  			} else {
  				singlePoints.push(segment[0]);
  			}
  		});
  
  		// Record it for use in drawGraph and drawTracker, and return graphPath
  		series.singlePoints = singlePoints;
  		series.graphPath = graphPath;
  		
  		return graphPath;
  		
  	}
docs: Get the graph path