Enabling / Disabling drop menu items dynamically

Recently, I had to find a way to enable or disable drop down menu items according
to the current view. While searching for an elegant solution, I've stumbled across a
piece of code that changed my approach all together. It seems that you can add data
binding into the XML data itself. While Flex compiles the file, it parses the XML data and
assigns the correct data binding.
Take a look at the example below:

Code can be found here.