Dispatches requests to an arbitrary list of grpc services
A gRPC stream for com.twitter.util.Event types.
A gRPC stream for com.twitter.util.Event types.
Because this is designed to be used in the context of an Activity/Var, the stream may NOT reflect all event states. Intermediate state transitions may be dropped in favor of buffering only the last-observed state.
Event values are wrapped by VarEventStream.Ev to indicate whether a value is terminal.