/* installing rank classes */
zebraRankInstall (reg, rank_1_class);
/* installing rank classes */
zebraRankInstall (reg, rank_1_class);
zebraRankInstall (reg, rank_similarity_class);
zebraRankInstall (reg, rank_static_class);
zebraRankInstall (reg, rank_similarity_class);
zebraRankInstall (reg, rank_static_class);