def to_a
      [
        required,
        short,
        long,
        desc,
        default,
        filter,
        action,
        cast,
        valid,
        validate
      ].compact
    end
def to_a
      [
        required,
        short,
        long,
        desc,
        default,
        filter,
        action,
        cast,
        valid,
        validate
      ].compact
    end
Returns Option converted to an array.