PolicyFor returns the [Policy] for the specified scope, creating it from the registered [source.Store]s if it doesn't already exist.

RegisterStore registers a new policy [source.Store] with the specified name and [setting.PolicyScope].

RegisterStoreForTest is like [RegisterStore], but unregisters the store when tb and all its subtests complete.

ErrAlreadyConsumed is the error returned when [StoreRegistration.ReplaceStore] or [StoreRegistration.Unregister] is called more than once.

ErrPolicyClosed is returned by [Policy.Reload], [Policy.addSource], [Policy.removeSource] and [Policy.replaceSource] if the policy has been closed.

Change represents a change from the Old to the New value of type T.

Policy provides access to the current effective [setting.Snapshot] for a given scope and allows to reload it from the underlying [source.Store] list.

PolicyChange describes a policy change.

StoreRegistration is a [source.Store] registered for use in the specified scope.

PolicyChangeCallback is a function called whenever a policy changes.