This is only accurate for ID3v2.3 or ID3v2.4. Please use the call below which accepts an ID3v2 version number. In the next non-binary compatible release this will be made into a non-static member that checks the internal ID3v2 version.
Please use the version of this method that accepts a version. This is only accurate for ID3v2.3 and ID3v2.4. This will be removed in the next binary incompatible release (2.0) and will be replaced with a non-static method that checks the frame version.
I don't see any reason to keep this around since there's nothing useful to be retrieved from the footer, but well, again, I'm prone to change my mind, so this gets to stay around until near a release.