I am trying to enable/disable menuitem in context menu using "enableWhen"
and propertyTester in handler. It works fine for single selection. But
when I multi select items in tree, It checks only one object. How can I
enable/disable menu items based upon the state of multiple object? Is
there any other way of enabling/disabling items apart from propertytester.
I tried to override isEnabled() method of IHandler but my object was not
available here.