docs: public static long multReorder(ZMatrixRMaj matA , ZMatrixRMaj matB ,
                                     ZMatrixRMaj matResult , int numTrials) {
          long prev = System.currentTimeMillis();
  
          for( int i = 0; i < numTrials; i++ ) {
              MatrixMatrixMult_ZDRM.mult_reorder(matA, matB, matResult);
          }
  
          long curr = System.currentTimeMillis();
          return curr-prev;
      }