u2                108 src/io_l2h1Calculator.cpp   const FEfun& u2 = uN;
u2                109 src/io_l2h1Calculator.cpp   return d_ptr->l2.distance(u1, u2);
u2                130 src/io_l2h1Calculator.cpp   const FEfun& u2 = uN;
u2                131 src/io_l2h1Calculator.cpp   return d_ptr->h1.distance(u1, u2);