u1                107 src/io_l2h1Calculator.cpp   const FEfun& u1 = u;
u1                109 src/io_l2h1Calculator.cpp   return d_ptr->l2.distance(u1, u2);
u1                129 src/io_l2h1Calculator.cpp   const FEfun& u1 = u;
u1                131 src/io_l2h1Calculator.cpp   return d_ptr->h1.distance(u1, u2);