docs: public static void mult(DMatrix1Row a , DMatrix1Row b , DMatrix1Row c )
      {
          if( b.numCols == 1 ) {
              MatrixVectorMult_DDRM.mult(a, b, c);
          } else if( b.numCols >= EjmlParameters.MULT_COLUMN_SWITCH ) {
              MatrixMatrixMult_DDRM.mult_reorder(a,b,c);
          } else {
              MatrixMatrixMult_DDRM.mult_small(a,b,c);
          }
      }