MyApp.Cldr.known_rbnf_locale_names

You're seeing just the function known_rbnf_locale_names, go back to MyApp.Cldr module for more information.
Link to this function

known_rbnf_locale_names()

View Source

Specs

known_rbnf_locale_names() :: [Cldr.Locale.locale_name()]

Returns a list of locale names which have rules-based number formats (RBNF).