Ubiquity Feedback Command

My experience in Ubiquity is nice. We had a task in the lab to add an Ubiquity command that takes another command as an argument and sends a feedback to the author of the command. Taking a command as an argument and being able to operate on it looked very tricky at the beginning, and I kept looking with a friend for a way to do that, and access the variables inside the command. We first looked at all the commands available trying to find a similar one, but that didn't work. Then we though about some naive methods, till we reached to the Go7a way of thinking by thinking about reading the documentation webpage and processing it to find the author through the web.
Finally a friend of ours told us about the function CmdUtils.getCommand(cmdName); however it didn't work for him, and didn't work for us either. Finally another friend told us that this command works only with the new Ubiquity that's not yet finally released. By that time the lab time was almost done and we didn't finish the command, and never tried again.