When a class graph evolves, we would like to know for which 
strategies the path set has changed. Therefore we would like
to have an algorithm for the following problem:

CLASS GRAPH EVOLUTION FOR STRATEGIES
Input: Strategy graph and two class graphs (use default name map)
Output: Is the path set different for the two class graphs?

How fast can this algorithm be made? What is the complexity
of the problem?

What is the best way to visualize the differences of the path sets
in APStudio?

-- Karl