interface RulesTriggerableInterface

interface RulesTriggerableInterface {
    
    /**
     * Gets configuration of all events the rule is reacting on.
     *
     * @return array
     *   The events array. The array is numerically indexed and contains arrays
     *   with the following structure:
     *   - event_name: String with the event machine name.
     *   - configuration: An array containing the event configuration.
     */
    public function getEvents();
    
    /**
     * Gets machine names of all events the rule is reacting on.
     *
     * @return string[]
     *   The array of fully qualified event names of the rule.
     */
    public function getEventNames();
    
    /**
     * Adds an event to the rule configuration.
     *
     * @param string $event_name
     *   The machine name of the event to add.
     * @param array $configuration
     *   (optional) Configuration of the event.
     *
     * @return \Drupal\rules\Core\RulesTriggerableInterface
     *   The object instance itself, to allow chaining.
     */
    public function addEvent(string $event_name, array $configuration = []);
    
    /**
     * Returns if the rule is reacting on the given event.
     *
     * @param string $event_name
     *   The machine name of the event to look for.
     *
     * @return bool
     *   TRUE if the rule is reacting on the given event, FALSE otherwise.
     */
    public function hasEvent(string $event_name);
    
    /**
     * Removes an event from the rule configuration.
     *
     * @param string $event_name
     *   The name of the (configured) event to remove.
     *
     * @return \Drupal\rules\Core\RulesTriggerableInterface
     *   The object instance itself, to allow chaining.
     */
    public function removeEvent(string $event_name);

}