You should look at the list of bindkey definitions for ones
which invoke SKILL commands. It's been some years since
I have, but I recall seeing syntax like ge skill() where ge is
the alias for GraphicsEditor and () is evaluated by SKILL
language subsequently.
Many kits use encrypted SKILL commands for things the
creator deems proprietary (.ile rather than .il).
You might try a more aggressive search in the Cadence
home and the process home (kit) for the root name,
like
du -a . | grep lebTransCB >whatIfound
and see what you catch. It could take a while. There
are undoubtedly more sophisticated tools, which I just
don't know about.