srvStringsWatcher defines the API for methods on a state.StringsWatcher.
Each client has its own current set of watchers, stored in resources.
srvStringsWatcher notifies about changes for all entities of a given kind,
sending the changes as a list of strings.
Next returns when a change has occurred to an entity of the
collection being watched since the most recent call to Next
or the Watch call that created the srvStringsWatcher.
srvStringsWatcher defines the API for methods on a state.StringsWatcher. Each client has its own current set of watchers, stored in resources. srvStringsWatcher notifies about changes for all entities of a given kind, sending the changes as a list of strings.