Poppover(doc): Undeclared 'model'

examples/docs/popover.md

@@ -76,7 +76,8 @@
           address: '上海市普陀区金沙江路 1518 弄'
         }],
         singleSelection: {},
-        multipleSelection: []
+        multipleSelection: [],
+        model: ''
       };
     },