Adds a Slice loader to this communicator, after the Slice loader set in InitializationData (if any) and after other Slice loaders added by this function.
Parameters
loader
The Slice loader to add.
Remarks
This function is not thread-safe and should only be called right after the communicator is created. It's provided for applications that cannot set the Slice loader in the InitializationData of the communicator, such as IceBox services.