src/vs/workbench/api/common/extHostTelemetry.ts/ExtHostTelemetry/$onDidChangeTelemetryLevel
class ExtHostTelemetry:	$onDidChangeTelemetryLevel(level: TelemetryLevel): void {
		this._oldTelemetryEnablement = this.getTelemetryConfiguration();
		this._level = level;
		const telemetryDetails = this.getTelemetryDetails();

		// Loop through all loggers and update their level
		this._telemetryLoggers.forEach(logger => {
			logger.updateTelemetryEnablements(telemetryDetails.isUsageEnabled, telemetryDetails.isErrorsEnabled);
		});

		if (this._oldTelemetryEnablement !== this.getTelemetryConfiguration()) {
			this._onDidChangeTelemetryEnabled.fire(this.getTelemetryConfiguration());
		}
		this._onDidChangeTelemetryConfiguration.fire(this.getTelemetryDetails());
	}