Cldr.Unit.validate_grammatical_gender

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

validate_grammatical_gender(grammatical_gender, locale \\ Cldr.default_locale())

View Source (since 3.5.0)

Validates a grammatical gender and normalizes it to a standard downcased atom form