Granting a petition for writ of mandate in the case of former employees suing their former employer, its president and sole shareholder, and a corporation held by the same man in the same manner claiming labor violations and unfair competition, holding that the trial court erred by granting a motion to certify a class action that limited its members because they used the wrong criteria, that the court erred by sanctioning plaintiff's counsel and denying a revised motion to compel responses, vacating findings that the companies are not alter egos, and finding other errors in the interpretation of caselaw and the definition of the term 'employer.'