public function get_checkout_url() {
		/**
		 * Gets the attendee registration checkout URL
		 * @since 4.9
		 */
		$checkout_url = apply_filters( 'tribe_tickets_attendee_registration_checkout_url', null );

		if ( Tribe__Tickets__Commerce__PayPal__Main::ATTENDEE_OBJECT === tribe_get_request_var( 'provider' ) ) {
			return null;
		}

		// When we want to change where we send folks based on providers, use
		// $this->has_mixed_providers_in_cart();

		return $checkout_url;
	}