title: Check when a graph is a subgraph of another graph in igraph
body: <p>I want to check whether a given subgraph G is the subgraph of another larger graph G' using igraph. Please notd this is not a subgraph isomorphism problem since I want the answer to be False if the labelling of any of the vertices or edges is different. I want the answer to be True if and only if both graphs have the same edge and vertex labels and G is a subgraph of G'. How do I accomplish this in igraph? Thanks. </p>