I'm working on your Harmonic Vos connector and QAction_1 has a using for SLSQA. I could not find this in Nuget. Is it a private Skyline Package? (Yes i grabbed it from our DMA and am referencing the assembly) just curious what it even is?
SLSQA can be found in the ProtocolScripts folder. I don't know by heart what it does as I never used it before myself. But after having a look, it holds an object that has a single method (getObject) and a dictionary. Inside the method, with a lock, it will try to retrieve a value from said dictionary. In essence a lock manager.
That being said, I would advise to not use this in the future as there is no documentation regarding this DLL and if really necessary, there is the 'SLLockManager' (also in ProtocolScripts) which by name alone is already a lot clearer and has more functionality. Again, we don't have any documentation for this, but at least it's more readable.