EXAMPLE - Importing and Using MTG data in GroIMP
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**NOTE: In this example, a .mtg file is already imported and a .rgg file has already been added into the project.
Begin at step 1 if you wish to find out how to load a .mtg file into GroIMP.
Skip to step 6 if you wish to know how to modify the loaded MTG data in this example project.
1. Open an MTG file
2. MTG node classes and corresponding GroIMP modules
3. MTG feature attributes and GroIMP module variables
4. Visualizing the MTG data
5. Saving the MTG graph in a GroIMP project
6. Modifying the loaded MTG graph