In core WP, the filter for defining a metabox gives us the POST ID so we can use data from the post to determine whether or not to even paint the metabox.
In METABOX.IO I can't seem to find a way to get to the POST data while defining the metabox. I want to look at some field values on the post to determine whether or not to even show the entire metabox in the first place.
Can someone point me to how that might be accomplished? I've looked at the conditional add-ons but they don't seem to do the trick as far as I can tell.