Is the decision in Dynamex retroactive?

Tomorrow, in VAZQUEZ (GERARDO) et al. v. JAN-PRO FRANCHISING INTERNATIONAL, INC., Supreme Court Case No. S258191 ((9th Cir. No. 17-16096; 939 F.3d 1045; N.D. of Cal. No. 3:16-cv-05961-WHA), the California Supreme Court will answer the following question for the Ninth Circuit: Does the decision in Dynamex Operations West Inc. v. Superior Court (2018) 4 Cal.5th 903, apply retroactively?