text: #ifndef _MSC_VER
    #warning deprecated
  #endif
  /*
  Matrix3d m = Matrix3d::Zero();
  m.part<Eigen::StrictlyUpperTriangular>().setOnes();
  cout << "Here is the matrix m:" << endl << m << endl;
  cout << "And let us now compute m*m.adjoint() in a very optimized way" << endl
       << "taking advantage of the symmetry." << endl;
  Matrix3d n;
  n.part<Eigen::SelfAdjoint>() = (m*m.adjoint()).lazy();
  cout << "The result is:" << endl << n << endl;
  */