theorem ::: obsolete as reductions are added
  for V being non empty set, E being set, S,T being Function of E,V holds
    the_Vertices_of createGraph(V,E,S,T) = V &
    the_Edges_of createGraph(V,E,S,T) = E &
    the_Source_of createGraph(V,E,S,T) = S &
    the_Target_of createGraph(V,E,S,T) = T;
