docs: @Override
      public void setExpectedMaxSize( int numRows , int numCols ) {
          super.setExpectedMaxSize(numRows,numCols);
  
          // if the matrix that is being decomposed is smaller than the block we really don't
          // see the B matrix.
          if( numRows < blockWidth)
              B = new DMatrixRMaj(0,0);
          else
              B = new DMatrixRMaj(blockWidth,maxWidth);
  
          chol = new CholeskyBlockHelper_DDRM(blockWidth);
      }