def list_event_types(topic_type_name, custom_headers:nil)
      response = list_event_types_async(topic_type_name, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def list_event_types(topic_type_name, custom_headers:nil)
      response = list_event_types_async(topic_type_name, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
List event types

 List event types for a topic type

 @param topic_type_name [String] Name of the topic type
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [EventTypesListResult] operation results.