You're seeing just the function default_number_system_type, go back to Cldr.Number.System module for more information.
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Return the default number system type name.

Currently this is :default. Note that this is not the number system itself but the type of the number system. It can be used to find the default number system for a given locale with number_systems_for(locale)[default_number_system()].


iex> Cldr.Number.System.default_number_system_type