src/vs/workbench/api/common/extHostTelemetry.ts/ExtHostTelemetry/instantiateLogger
class ExtHostTelemetry:	instantiateLogger(extension: IExtensionDescription, appender: vscode.TelemetryAppender) {
		const telemetryDetails = this.getTelemetryDetails();
		const logger = new ExtHostTelemetryLogger(
			appender,
			extension,
			this._outputLogger,
			this._inLoggingOnlyMode,
			this.getBuiltInCommonProperties(extension),
			{ isUsageEnabled: telemetryDetails.isUsageEnabled, isErrorsEnabled: telemetryDetails.isErrorsEnabled }
		);
		this._telemetryLoggers.set(extension.identifier.value, logger);
		return logger.apiTelemetryLogger;
	}