def match_iso(code)
      match = QNAMES.find { |c| c == code.downcase.to_sym }
      from_sym(match)
    end
def match_iso(code)
      match = QNAMES.find { |c| c == code.downcase.to_sym }
      from_sym(match)
    end
Converts string or symbol for a three letter language code to an
 `ActiveTriples::Resource`.

 @param code [#to_sym] a three letter iso code
 @return [DPLA::MAP::Controlled::Language]