Merge pull request #185 from corot/patch-1

Minor fix on Getting started tutorial: GraphName constructor is now private.

docs/src/main/sphinx/getting_started.rst

@@ -39,7 +39,7 @@ implementation:
 
     @Override
     public GraphName getDefaultNodeName() {
-      return new GraphName("my_node");
+      return GraphName.of("my_node");
     }
 
     @Override