Does the anti-SLAPP statute apply to a mixed cause of action?

However, "[t]he 'principal thrust or gravamen' of the claim determines whether [Code of Civil Procedure] section 425.16 applies. [Citation.]" (Mann v. Quality Old Time Service, Inc. (2004) 120 Cal.App.4th 90, 103.) "[W]here a cause of action alleges both protected and unprotected activity, the cause of action will be subject to section 425.16 unless the protected conduct is 'merely incidental' to the unprotected conduct [citations] . . . ." (Ibid.) In short, "the anti-SLAPP statute applies to a mixed cause of action. [Citation.]" (Ibid.)