Method: Return the string representation of this provider class as the class name for backwards compatibility.
Method: Given a provider string (class module name or slug), get its class instance if an active module.
Method: Given a post ID, get the instance of the saved or default ticket provider class.
Method: Given a ticket provider, get its Attendee Optout Meta Key from its class property (or constant if legacy).
Method: Whether a post has tickets from this provider, even if this provider is not the default provider.
Method: Get JS localize data for ticket options.
Filter Hook: Allow filtering how often tickets availability is checked (in milliseconds).
Method: Get JS localize data for currencies.
Method: Get JS localize data for cart/checkout URLs.