docs: @Override
      public boolean setA(DMatrixRMaj A) {
          if( A.numRows > maxRows || A.numCols > maxCols )
              setMaxSize(A.numRows,A.numCols);
  
          _setA(A);
          if( !decomposer.decompose(A) )
              return false;
  
          QR = decomposer.getQR();
          return true;
      }