code: long getCEFromOffsetCE32(int c, int ce32) {
          long dataCE = ces[Collation.indexFromCE32(ce32)];
          return Collation.makeCE(Collation.getThreeBytePrimaryForOffsetData(c, dataCE));
      }
docs: Computes a CE from c's ce32 which has the OFFSET_TAG.