@Override
    public @NonNull Iterable<@NonNull String> stringSuggestions(final @NonNull CommandContext<C> commandContext,
                                                                final @NonNull CommandInput input) {
        return EnumSet.allOf(this.enumClass).stream().map(e -> e.name().toLowerCase(Locale.ROOT)).collect(Collectors.toList());
    }
Returns a collection containing all accepted values.

@return the accepted values
cloud-core/src/main/java/org/incendo/cloud/parser/standard/EnumParser.java