[maxmsp] [Java] abstractions -vs- subpatches

Hello,

I am coding some Java thingies for work and pleasure.  I would like to test my patches for subpatches and abstractions.  I know that MaxBox has isPatcher() method, which is very helpful and there also is getFilePath() in MaxPatcher.  With these 2, half of my toy is done but what I cannot figure out is how to make a distinction between a subpatch and an abstraction (other than doing some regex on what getFilePath() reports but I was thinking that there must be a simpler way,no?)

thanks for any pointers.

./MiS