DisjointDEC(ProcessorGroup& source_group, ProcessorGroup& target_group);
DisjointDEC(const DisjointDEC&);
DisjointDEC &operator=(const DisjointDEC& s);
DisjointDEC(const std::set<int>& src_ids, const std::set<int>& trg_ids,
const MPI_Comm& world_comm=MPI_COMM_WORLD);
void setNature(NatureOfField nature);
DisjointDEC(ProcessorGroup& source_group, ProcessorGroup& target_group);
DisjointDEC(const DisjointDEC&);
DisjointDEC &operator=(const DisjointDEC& s);
DisjointDEC(const std::set<int>& src_ids, const std::set<int>& trg_ids,
const MPI_Comm& world_comm=MPI_COMM_WORLD);
void setNature(NatureOfField nature);