docs: public /**/double quality() {
          if( is64 ) {
              return DecompositionFactory_DDRM.quality((DMatrixRMaj)mat, (DMatrixRMaj)U.getMatrix(),
                      (DMatrixRMaj)W.getMatrix(), (DMatrixRMaj)V.transpose().getMatrix());
          } else {
              return DecompositionFactory_FDRM.quality((FMatrixRMaj)mat, (FMatrixRMaj)U.getMatrix(),
                      (FMatrixRMaj)W.getMatrix(), (FMatrixRMaj)V.transpose().getMatrix());        }
      }