Use new abstractions in the implementation of DEFINE-ACCESSORS.
Use new abstractions in the implementation of DEFINE-ACCESSORS.

vtomole/SICL,clasp-developers/SICL,vtomole/SICL,vtomole/SICL,vtomole/SICL,clasp-developers/SICL,clasp-developers/SICL,clasp-developers/SICL