/// <summary>
/// Case insensitive version for <see cref="System.CommandLine.OptionExtensions.FromAmong{TOption}(TOption, string[])"/>.
/// </summary>
internal static void FromAmongCaseInsensitive(this Option <string> option, string[]?allowedValues = null, string?allowedHiddenValue = null)
{
allowedValues ??= Array.Empty <string>();
option.AddValidator(optionResult => ValidateAllowedValues(optionResult, allowedValues, allowedHiddenValue));
option.AddCompletions(allowedValues);
}