(Unity for iOS) Native plugin import in JavaScript

Plugin.js

import System.Runtime.InteropServices;

#if UNITY_IPHONE && !UNITY_EDITOR

@DllImportAttribute("__Internal") static private function _PluginFoo(arg : int) {}

#else

static private function _PluginFoo(arg : int) {
  // iOS以外での代替処理。
}

#endif

static function Foo(arg : int) {
  _PluginFoo(arg);
}