execCommand

Hello all. I am currently developing a few plugins to integrate CKEditor into a pre-existing content management system and have run into a snag. I have been searching for a method to pass a piece of information between a couple different plugins etc. However, that is not all too important.

The question I have is that, according to the documentation, there is a second optional parameter to execCommand. It is said to be used to pass data to the called command, but what I do not understand (and have failed to find an example of) is how the command that is called using execCommand is supposed to access this data.

So far searching through _source has yielded zero examples, so I am hoping for a resolution here.

Thanks in advance!