How can I use vsphere.core.${objectType}.monitorCategories extension point?

There was a question how vsphere.core.${objectType}.monitorCategories extension point can be used.

The usage of this extension point is documented in the official vSphere Web Client SDK documentation: https://vdc-download.vmware.com/vmwb-repository/dcr-public/a6383b70-f20e-4f68-be41-65d98a7c6778/d5572dc1-850b-4730-bf9a-de7635721d79/vsphere-web-client-extensions-sdk-65-programming-guide.pdf

In addition, vSphere Web Client SDK 6.5 Update 1 and Fling 10 provide a sample which demonstrate it. The sample is called vsphere-wssdk. You can go to its plugin.xml file to observe the following code snippet:

 <extension id="com.vmware.samples.vspherewssdk.vm.monitor.category">

      <extendedPoint>vsphere.core.vm.monitorCategories</extendedPoint>

      <object>

         <label>#{monitor.category}</label>

      </object>

   </extension>

Note that vsphere.core.${objectType}.monitorCategories extension is supported only on HTML Client.