What is the test for awarding expert witness costs?

Appellants claim that the trial court "abused its discretion [in] awarding [the] entirety of the expert witness costs requested by Respondent" because appellants were "able to prove that Respondent . . . was negligent in the design of the subject [Century] P2 headgear with face shield." The claim is forfeited because it is not supported by meaningful legal analysis with citations to authority. "'When a point is asserted without argument and authority for the proposition, "it is deemed to be without foundation and requires no discussion by the reviewing court." [Citations.]' [Citation.]" (Saltonstall v. City of Sacramento, supra, 234 Cal.App.4th at p. 588.)