## SubscribeChanges

Message to FileActor asking to be notified of files' changing contents and
deletions for the given directory or file path.



## FileContents

Message from FileActor with contents of a file.


## FileDeleted

Message from FileActor indicating a file was deleted.


## FileActor

File interactions.

Accepts:
- SubscribeChanges messages, which result in FileContents and FiledDeleted
messages being sent to original subscriber.



## _write((23.mdk_runtime.files._write.path, 23.mdk_runtime.files._write.contents))

## _delete((23.mdk_runtime.files._delete.path,))

## _mktempdir(())

## FileActorImpl

Polling-based subscriptions.

Should switch to inotify later on.

Shim over native implementations. Need better way to do this.



## _Subscription

A specific file notification subscription.