hasCmsData

Returns true if this entity has actual CMS data (not just resolved-as-null). Use this to skip expensive CMS-dependent operations (populateText, StyleOptions lookups) for entities that will never have CMS content. An entity is considered to have CMS data when: - cmsEntity is non-null, AND - cmsEntity.propertyId != -1 (i.e., it's not the empty placeholder instance)