Multipoint从3.14移到4.0上没调通，请教正确的使用方法

var mp = new esri.geometry.Multipoint(new esri.SpatialReference({

				wkid : 4326

			}));

			var myData = JSON.parse(data);

			mp.points = myData.map(function(x) {

				return x;

			});

			var symbol = new esri.symbols.SimpleMarkerSymbol({

				"color" : [ 255, 255, 255, 255 ],

				//"size" : map.getLevel()+3,

				"size" : 4,

				"type" : "esriSMS",

				"style" : "esriSMSCircle",

				"outline" : {

					"color" : [ 60, 60, 255, 255 ],

					"width" : 1,

					"type" : "esriSLS",

					"style" : "esriSLSSolid"

				}

			});

			var gra = new esri.Graphic(mp);

			gra.setSymbol(symbol);

			layer_ship_simple.add(gra);