Extension points - nodespecs fling sdk

hi,

The following extension points is not working .Can you please let me know what needs to be fixed.

Expectation is a custom object on the left pane of the web-client after selecting a specific object from the main view.

<templateInstance id="abc.xyz.viewTemplateInstance">      <templateId>vsphere.core.inventory.objectViewTemplate</templateId>      <variable name="namespace" value="abc.xyz"/>      <variable name="objectType" value="sample:customObject"/>   </templateInstance>      <extension id="123.456">      <extendedPoint>vise.navigator.nodespecs</extendedPoint>      <object>         <title>#{ }</title>         <parentUid>vsphere.core.navigator.virtualInfrastructure</parentUid>      </object>   </extension>       <templateInstance id="abc.lists.prq">       <templateId>vsphere.core.inventorylist.objectCollectionTemplate</templateId>       <variable name="namespace" value="abc.xyz.collection"/>       <variable name="title" value="#{ }"/>       <variable name="icon" value="#{ }"/>       <variable name="objectType" value="sample:customObject"/>       <variable name="listViewId" value="abc.xyz.list"/>       <variable name="parentUid" value="123.456"/>    </templateInstance>