code: function MD5(source) { // @arg String - source string
                         // @ret MD5HashHexString
  //{@dev
      $valid($type(source, "String"), MD5, "source");
  //}@dev
  
      var md5 = DataType["Array"]["toHexStringArray"](
                      MD5_encode(
                          DataType["Uint8Array"]["fromString"](source) ) );
  
      return md5.join("");
  }
docs: --- class / interfaces ----------------------------------