src/vs/platform/environment/common/environmentService.ts/AbstractNativeEnvironmentService/extensionLogLevel
class AbstractNativeEnvironmentService:	get extensionLogLevel(): [string, string][] | undefined {
		const result: [string, string][] = [];
		for (const entry of this.args.log || []) {
			const matches = EXTENSION_IDENTIFIER_WITH_LOG_REGEX.exec(entry);
			if (matches && matches[1] && matches[2]) {
				result.push([matches[1], matches[2]]);
			}
		}
		return result.length ? result : undefined;
	}