Abstract superclass for services that a node can host, which provides helper functions.

A service that implements AcceptsFileUpload can have new binary data provided to it via an HTTP upload.

Thread-safe storage of fiber checkpoints.

Provides access to various metrics and ways to notify monitoring services of things, for sysadmin purposes. This is not an interface because it is too lightweight to bother mocking out.

Placeholder interface for regulator services.