WIP - add extractor, generate snippet_data

node_modules/topo/README.md

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+# topo
+
+Topological sorting with grouping support.
+
+[![Build Status](https://secure.travis-ci.org/hapijs/topo.svg?branch=master)](http://travis-ci.org/hapijs/topo)
+
+Lead Maintainer: [Devin Ivy](https://github.com/devinivy)
+
+## Usage
+
+See the [API Reference](API.md)
+
+**Example**
+```node
+const Topo = require('topo');
+
+const morning = new Topo();
+
+morning.add('Nap', { after: ['breakfast', 'prep'] });
+
+morning.add([
+    'Make toast',
+    'Pour juice'
+], { before: 'breakfast', group: 'prep' });
+
+morning.add('Eat breakfast', { group: 'breakfast' });
+
+morning.nodes;        // ['Make toast', 'Pour juice', 'Eat breakfast', 'Nap']
+```