Is there anyway to export the grid structure as a graph (e.g. networkX)?

### Versions

- [ ] Python version:
- [ ] Python architecture:
- [ ] Operating system and version:
- [ ] OpenDSSDirect.py version number:

### Feature Request

### Bug

* **What is the current behavior?**

* **What is the expected behavior? What is the motivation / use case for changing the behavior?**

* **What are the steps to reproduce this bug? Please provide a minimal working example of the bug if possible.**

* **Other information** (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, gitter, etc)

### Support Question