Google先生も知らないJXAのプライベートメソッド ref: http://qiita.com/zakuroishikuro/items/a7def965f49a2ab55be4

file10.js

var app = Application("Finder");
var win = app.windows[0];

Automation.getDisplayString(win)
//=> "Application(\"Finder\").windows.at(0)"

>> Automation.log(win)
//[object ObjectSpecifier]
//=> undefined

file10.txt

var term = Application("Terminal");

reveal(term);

file11.txt

var term = Application("Terminal");

reveal(term);

file12.txt

reveal(ObjC);

file5.js

var qt = Application("QuickTime Player");

qt.activate();
qt.quit(); 
qt.launch();

file6.js

// アプリケーションを取得
var qt = Application("QuickTime Player");
// この時点で起動してなかったら起動される

qt.activate(); //フォーカスを移す
qt.quit();  //終了
qt.launch(); //起動

file7.js

str = "hello"

// launch new TextEdit window
editor = Application("TextEdit");
doc = editor.Document().make();

// set text
doc.text = str;
//=> "hello"
doc.text.set(str); //same above
//=> true
doc.setProperty("text", str); //same above
//=> true

// get text
doc.text();
//=> "hello"
doc.text.get(); //same above
//=> "hello"
doc.getProperty("text").get(); //same above
//=> "hello"

file8.js

// set text
doc["text"] = "hi"
// "hello"

// get text
doc["text"]()
// "hi"

file9.js

var app = Application("Finder");
var win = app.windows[0];

Automation.getDisplayString(win)
//=> "Application(\"Finder\").windows.at(0)"

>> Automation.log(win)
//[object ObjectSpecifier]
//=> undefined

usage

var finder = Application("Finder");

ObjectSpecifier.hasInstance(finder);
//=> true
ObjectSpecifier.hasInstance("foo");
//=> false

ObjectSpecifier.classOf(finder);
//=> "application";
ObjectSpecifier.classOf("foo");
//=> undefined

usage(properties)

var itunes = Application("iTunes");

itunes.properties()
/*=> {
  "class": "application",
  "name": "iTunes",
  "playerState": "stopped",
  "version": "12.1",
  "frontmost": false,
  "soundVolume": 100,
  "mute": false,
  "visualsEnabled": false,
  "fullScreen": false,
  "visualSize": "large",
  "eqEnabled": false,
  "fixedIndexing": false,
  "playerPosition": null,
  "converting": false,
  "currentStreamTitle": null,
  "currentStreamURL": null,
  "airplayEnabled": false,
  "currentAirPlayDevices": [
    null
  ],
  "iadIdentifier": null
}*/

普通にはプロパティ取得できない

var finder = Application("Finder");

Object.keys(finder); //=> []
Object.getOwnPropertyNames(finder) //=> ["__private__"]

finder.hasOwnProperty("a"); //=> true
finder.hasOwnProperty("ab"); //=> true
finder.hasOwnProperty("abc"); //=> true //なわけないじゃん