that their proposed class satisfies each requirement of Rule 23, including . . . the predominance requirement of Rule 23(b)(3)." Halliburton Co. v. Erica P. John Fund, Inc., 134 S. Ct. 2398, 2412, 189 L. Ed. 2d 339 (2014). At least as to predominance, Plaintiffs have yet to prove anything. Plaintiffs did not chal