// a feature model obtained from gg4-model.m

  !Gtp | _Undirected | _Directed;
  !_Undirected | Gtp;
  !_Directed | Gtp;
  !_Undirected | !_Directed;
  !GPL | MainGpl;
  !MainGpl | GPL;
  !HiddenGtp | _UndirectedOnlyVertices | _UndirectedWithNeighbors | _UndirectedWithEdges | _DirectedOnlyVertices | _DirectedWithNeighbors | _DirectedWithEdges;
  !_UndirectedOnlyVertices | HiddenGtp;
  !_UndirectedWithNeighbors | HiddenGtp;
  !_UndirectedWithEdges | HiddenGtp;
  !_DirectedOnlyVertices | HiddenGtp;
  !_DirectedWithNeighbors | HiddenGtp;
  !_DirectedWithEdges | HiddenGtp;
  !_UndirectedOnlyVertices | !_UndirectedWithNeighbors;
  !_UndirectedOnlyVertices | !_UndirectedWithEdges;
  !_UndirectedOnlyVertices | !_DirectedOnlyVertices;
  !_UndirectedOnlyVertices | !_DirectedWithNeighbors;
  !_UndirectedOnlyVertices | !_DirectedWithEdges;
  !_UndirectedWithNeighbors | !_UndirectedWithEdges;
  !_UndirectedWithNeighbors | !_DirectedOnlyVertices;
  !_UndirectedWithNeighbors | !_DirectedWithNeighbors;
  !_UndirectedWithNeighbors | !_DirectedWithEdges;
  !_UndirectedWithEdges | !_DirectedOnlyVertices;
  !_UndirectedWithEdges | !_DirectedWithNeighbors;
  !_UndirectedWithEdges | !_DirectedWithEdges;
  !_DirectedOnlyVertices | !_DirectedWithNeighbors;
  !_DirectedOnlyVertices | !_DirectedWithEdges;
  !_DirectedWithNeighbors | !_DirectedWithEdges;
  !HiddenWgt | WeightOptions;
  !WeightOptions | HiddenWgt;
  !Src | _DFS | _BFS;
  !_DFS | Src;
  !_BFS | Src;
  !_DFS | !_BFS;
  !Alg | _MSTKruskal | _MSTPrim | _Cycle | StrongC | _Connected | _Number;
  !_MSTKruskal | Alg;
  !_MSTPrim | Alg;
  !_Cycle | Alg;
  !StrongC | Alg;
  !_Connected | Alg;
  !_Number | Alg;
  !Implementation | _WithEdges | _WithNeighbors | _OnlyVertices;
  !_WithEdges | Implementation;
  !_WithNeighbors | Implementation;
  !_OnlyVertices | Implementation;
  !_WithEdges | !_WithNeighbors;
  !_WithEdges | !_OnlyVertices;
  !_WithNeighbors | !_OnlyVertices;
  !Wgt | _Unweighted | _Weighted;
  !_Unweighted | Wgt;
  !_Weighted | Wgt;
  !_Unweighted | !_Weighted;
  !_WithEdges | WithEdges;
  !WithEdges | _WithEdges;
  !_DFS | DFS;
  !DFS | _DFS;
  !_UndirectedOnlyVertices | UndirectedOnlyVertices;
  !UndirectedOnlyVertices | _UndirectedOnlyVertices;
  !_OnlyVertices | OnlyVertices;
  !OnlyVertices | _OnlyVertices;
  !_Number | Number;
  !Number | _Number;
  !_DirectedWithNeighbors | DirectedWithNeighbors;
  !DirectedWithNeighbors | _DirectedWithNeighbors;
  !_MSTPrim | MSTPrim;
  !MSTPrim | _MSTPrim;
  !_Cycle | Cycle;
  !Cycle | _Cycle;
  !_DirectedOnlyVertices | DirectedOnlyVertices;
  !DirectedOnlyVertices | _DirectedOnlyVertices;
  !_UndirectedWithNeighbors | UndirectedWithNeighbors;
  !UndirectedWithNeighbors | _UndirectedWithNeighbors;
  !_Undirected | Undirected;
  !Undirected | _Undirected;
  !_UndirectedWithEdges | UndirectedWithEdges;
  !UndirectedWithEdges | _UndirectedWithEdges;
  !_MSTKruskal | MSTKruskal;
  !MSTKruskal | _MSTKruskal;
  !StrongC | Transpose;
  !Transpose | StrongC;
  !StrongC | StronglyConnected;
  !StronglyConnected | StrongC;
  !_WithNeighbors | WithNeighbors;
  !WithNeighbors | _WithNeighbors;
  !_DirectedWithEdges | DirectedWithEdges;
  !DirectedWithEdges | _DirectedWithEdges;
  !_Directed | Directed;
  !Directed | _Directed;
  !_Unweighted | Unweighted;
  !Unweighted | _Unweighted;
  !_Weighted | Weighted;
  !Weighted | _Weighted;
  !MainGpl | TestProg;
  !TestProg | MainGpl;
  !MainGpl | Alg;
  !Alg | MainGpl;
  !Src | MainGpl;
  !MainGpl | HiddenWgt;
  !HiddenWgt | MainGpl;
  !MainGpl | Wgt;
  !Wgt | MainGpl;
  !MainGpl | HiddenGtp;
  !HiddenGtp | MainGpl;
  !MainGpl | Gtp;
  !Gtp | MainGpl;
  !MainGpl | Implementation;
  !Implementation | MainGpl;
  !MainGpl | Base;
  !Base | MainGpl;
  !_BFS | BFS;
  !BFS | _BFS;
  !WeightedWithEdges | WeightOptions;
  !WeightedWithNeighbors | WeightOptions;
  !WeightedOnlyVertices | WeightOptions;
  !_Connected | Connected;
  !Connected | _Connected;
  !Number | Gtp;
  !Number | Src;
  !Connected | Undirected;
  !Connected | Src;
  !StrongC | Directed;
  !StrongC | DFS;
  !Cycle | Gtp;
  !Cycle | DFS;
  !MSTKruskal | Undirected;
  !MSTKruskal | Weighted;
  !MSTPrim | Undirected;
  !MSTPrim | Weighted;
  !MSTKruskal | !MSTKruskal | !MSTPrim;
  !MSTPrim | !MSTKruskal | !MSTPrim;
  !OnlyVertices | !Weighted | WeightedOnlyVertices;
  !WithNeighbors | !Weighted | WeightedWithNeighbors;
  !WithEdges | !Weighted | WeightedWithEdges;
  !OnlyVertices | !Directed | DirectedOnlyVertices;
  !WithNeighbors | !Directed | DirectedWithNeighbors;
  !WithEdges | !Directed | DirectedWithEdges;
  !OnlyVertices | !Undirected | UndirectedOnlyVertices;
  !WithNeighbors | !Undirected | UndirectedWithNeighbors;
  !WithEdges | !Undirected | UndirectedWithEdges;
  GPL;