template class xf::fintech::TreeLattice <DT, Model, Process, Instrument, 2, LEN, LEN2>

#include "tree_lattice.hpp"
template <
    typename DT,
    typename Model,
    typename Process,
    typename Instrument,
    int LEN,
    int LEN2
    >
class TreeLattice <DT, Model, Process, Instrument, 2, LEN, LEN2>