public void addEdge(final EdgeType edge) {
    Preconditions.checkNotNull(edge, "Edge argument can not be null");

    m_edges.add(edge);
    updateNodeToEdgeMapping(edge);
  }
Adds an edge to the graph.

@param edge The edge to add.
java/zylib/src/main/java/com/google/security/zynamics/zylib/types/graphs/MutableDirectedGraph.java