interface TracingChannelSubscribers
start: (message: ContextType) => voidend: (message: ContextType & { error?: unknown; result?: unknown; }) => voidasyncStart: (message: ContextType & { error?: unknown; result?: unknown; }) => voidasyncEnd: (message: ContextType & { error?: unknown; result?: unknown; }) => voiderror: (message: ContextType & { error: unknown; }) => void