Unloads all add-on libraries previously loaded by Softimage, allowing add-on developers to compile an add-on library
while in use in Softimage. The following add-on library types can be unloaded: compiled operators, compiled custom
commands, run-time shaders, events.
These add-on libraries can also be unloaded from the Libraries dialog located in the main menu under File >
Addon > Libraries. Once you have unloaded an add-on library, the Softimage object connected to the library (for
example, operators, shaders, etc.) is no longer affected by the add-on until the library is loaded back. You
don't need to reload the add-on explicitly since Softimage automatically reloads it when required. For instance, a
compiled operator library is reloaded when an evaluation is required.