public Graph2D getGraph() {
    return m_graph;
  }
Returns the Graph2D object managed by the AbstractZyGraph. Be careful with this function - do
not use it from code that lives outside of the yfileswrap/ folders, because it introduces
dependency on yFiles.

@return The Graph2D object.
java/zylib/src/main/java/com/google/security/zynamics/zylib/yfileswrap/gui/zygraph/AbstractZyGraph.java