Save a dot file to be used by the Graphviz set of tools for graph
visualization. This dot file can than be used for instance to produce
-a pdf file with
+a pdf file such as [this one](https://fleuret.org/git-extract/dagnn/graph.pdf) with
```
dot graph.dot -T pdf -o graph.pdf
```
+
+### nn.DAG:setLabel(module, name) ###
+
+Add a label to the given module, that will be used for DAG:print() and DAG:saveDot()