Function nextPoint

public/assets/bower_components/Chart.js/Chart.js:2774–2776

(point, collection, index)

				return item.value !== null;
			},
			nextPoint = function(point, collection, index){
				return helpers.findNextWhere(collection, hasValue, index) || point;
			},
			previousPoint = function(point, collection, index){
				return helpers.findPreviousWhere(collection, hasValue, index) || point;
			};