src/vs/platform/telemetry/common/telemetryIpc.ts/TelemetryAppenderClient/log
class TelemetryAppenderClient:	log(eventName: string, data?: any): any {
		this.channel.call('log', { eventName, data })
			.then(undefined, err => `Failed to log telemetry: ${console.warn(err)}`);

		return Promise.resolve(null);
	}