title: JQuery EasyUI Treegrid cannot display json object data correctly using formatter
body: <p>I have jsondata something as follows:</p>
  
  <pre><code>"rows":[                                                          
          {"code":"001","name":"Name 1","addr":"Address 11","col4":{"data":"col4 data","value":"col4 value"}},
          {"code":"002","name":"Name 2","addr":"Address 13","col4":{"data":"col4 data","value":"col4 value"}},
          {"code":"003","name":"Name 3","addr":"Address 87","col4":{"data":"col4 data","value":"col4 value"}},
          {"code":"004","name":"Name 4","addr":"Address 63","col4":{"data":"col4 data","value":"col4 value"}},
          {"code":"005","name":"Name 5","addr":"Address 45","col4":{"data":"col4 data","value":"col4 value"}},
          {"code":"006","name":"Name 6","addr":"Address 16","col4":{"data":"col4 data","value":"col4 value"}},
          {"code":"007","name":"Name 7","addr":"Address 27","col4":{"data":"col4 data","value":"col4 value"}},
          {"code":"008","name":"Name 8","addr":"Address 81","col4":{"data":"col4 data","value":"col4 value"}},
          {"code":"009","name":"Name 9","addr":"Address 69","col4":{"data":"col4 data","value":"col4 value"}},
          {"code":"010","name":"Name 10","addr":"Address 78","col4":{"data":"col4 data","value":"col4 value"}}
  ]
  </code></pre>
  
  <p>Intended to display the data and value of col4 in two different columns. Hence added the following in the treegrid table definition.</p>
  
  <pre><code>{field:'col4',title:'Col41 data',width:150,rowspan:2,formatter:function (value,row,index){return value["data"];}},
  {field:'col4',title:'Col41 value',width:150,rowspan:2,formatter:function (value,row,index){return value["value"];}}
  </code></pre>
  
  <p>Expected it to work but <strong>only the data field is visible by the formatter. The second formatter never works for the column.</strong></p>
  
  <p>Does anyone know of any workaround available?</p>