Is it possible to create a layout where the value of a property A causes property B to be exposed to the user? In my example, I'm allowing the user to specify whether they want to expand the disk at provision time. If they select true, I want another box to show up to allow them to enter the new size of the disk. I don't want the size property to be exposed if they don't want to increase the disk size, because it would be confusing.
