Listing all arrowhead types

I would like to collect all available arrowhead types, which are system family types of the built in family “Arrowhead”

I could not find any element type enum value matching the arrowhead types. Also, when retrieving the type assigned on a textnotetype, all I get is a basic ElementType class element. Using the element.type node on it returns blank results.

For this, I have listed the Arrowhead types by hand and used a definition inside the Arrowhead Assigner node from Rhythm to create a custom node that can select the elements from strings:

Here is the slution

How did you create the Arrowhead type node?