code: function getNearestItems(chart, position, intersect, distanceMetric) {
  	var minDistance = Number.POSITIVE_INFINITY;
  	var nearestItems = [];
  
  	parseVisibleItems(chart, function(element) {
  		if (intersect && !element.inRange(position.x, position.y)) {
  			return;
  		}
  
  		var center = element.getCenterPoint();
  		var distance = distanceMetric(position, center);
  		if (distance < minDistance) {
  			nearestItems = [element];
  			minDistance = distance;
  		} else if (distance === minDistance) {
  			// Can have multiple items at the same distance in which case we sort by size
  			nearestItems.push(element);
  		}
  	});
  
  	return nearestItems;
  }
docs: Helper function to get the items nearest to the event position considering all visible items in teh chart
  @param {Chart} chart - the chart to look at elements from
  @param {object} position - the point to be nearest to
  @param {boolean} intersect - if true, only consider items that intersect the position
  @param {function} distanceMetric - function to provide the distance between points
  @return {ChartElement[]} the nearest items