Unable to control on-board LEDs (USR0-USR3)

[pdp7]

charlesh-nyc reported issue on the Adafruit forum:
https://forums.adafruit.com/viewtopic.php?f=49&t=51906&p=437760#p262314

I'd like to write a python script for controlling the onboard LEDs (USR0-USR3) while piggybacking on the AdaFruit BBIO Library.
Looking at the source, I see that the library does reference the LEDs on lines 49-52.
However, it's unclear to me how to actually call the pins from the library.

cshields also reported inability to control the on-board LEDs via Adafruit BBIO:

I'm having the same issue - no way to control the USR LEDs from BBIO, either calling them by USR# or by GPIO0_53, 54, etc..
It all works fine if I use external LEDs

I was also able to reproduce this issue.

[pdp7]

I've created Pull Request #88 that adds support for on-board LEDs (USR0-USR3)