just realized that instead of writing these all out you should be able to derive them programmatically from `topLevelEventsToDispatchConfig`. something like:

```
for (var topLevelType in topLevelEventsToDispatchConfig) {
   eventTypes[topLevelEventsToDispatchConfig[topLevelType]].dependencies = [topLevelType];
}
```

in the top level of SimpleEventPlugin.