Method resize

unsupported/Eigen/src/SparseExtra/BlockSparseMatrix.h:538–542

* \brief Set the number of rows and columns blocks */

      * \brief Set the number of rows and columns blocks
      */
    inline void resize(Index brow, Index bcol)
    {
      m_innerBSize = IsColMajor ? brow : bcol;
      m_outerBSize = IsColMajor ? bcol : brow;
    }

    /**
      * \brief set the block size at runtime for fixed-size block layout