extensions/typescript-language-features/src/utils/tracer.ts/Tracer/traceEvent
class Tracer:	public traceEvent(serverId: string, event: Proto.Event): void {
		if (this.trace === Trace.Off) {
			return;
		}
		let data: string | undefined = undefined;
		if (this.trace === Trace.Verbose && event.body) {
			data = `Data: ${JSON.stringify(event.body, null, 4)}`;
		}
		this.logTrace(serverId, `Event received: ${event.event} (${event.seq}).`, data);
	}