Unloads an add-on library 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.