title: Get property from model in array
body: <p>Im trying to get Property from JsonModel </p>
  
  <p>this is my code: </p>
  
  <p><code>acountsJson = sap.ui.getCore().getModel("acounts").getProperty("/acounts/");
      alert(acountsJson.length);
      acoutnJson[0].getProperty("/uName");</code></p>
  
  <p>in first alert I get the lenght but I can't get property. </p>