template<typename Graph>
class lemon::SubGraph< Graph >
Graph which uses a subset of an other graph's nodes and edges. This class is an alternative to the SubGraphAdaptor which is created for the same reason. The main difference between the two class that it makes linked lists on the unhidden nodes and edges what cause that on sparse subgraphs the algorithms can be more efficient and some times provide better time complexity. On other way this implemetation is less efficient in most case when the subgraph filters out only a few nodes or edges.