Method SetFacet

comp/globalinterfacespace.cpp:221–231

      using INTERFACEFE = InterfaceFE;

      void SetFacet(int nr, InterfaceFE* fe)
      {
        int old_size = facets.Size();
        if (nr+1 > old_size)
          {
            facets.SetSize(nr+1);
            for(auto i : Range(old_size, nr))
              facets[i] = nullptr;
          }
        facets[nr] = fe;
      }
      InterfaceFE* GetFacet(int nr) const
      {
        if(facets.Size() <= nr) return nullptr;