clear_all_descriptor_models — This operator is inoperable. It had the following function:
Free the memory of all descriptor models in RAM.
clear_all_descriptor_models is obsolete, inoperable, and is only
provided for reasons of backward compatibility. New applications should not
clear_all_descriptor_models, the operator will be removed in
clear_all_descriptor_models( : : : )
If the operator is successful,
returns the value 2 (H_MSG_TRUE). If necessary an exception is raised.