Provided enum static emit

[alexeagle]

browserevent.js

goog.provide('goog.events.BrowserEvent');
goog.provide('goog.events.BrowserEvent.MouseButton');
/**
 * @constructor
 * @extends {goog.events.Event}
 */
goog.events.BrowserEvent = function(opt_e, opt_currentTarget) {
}
/**
 * Normalized button constants for the mouse.
 * @enum {number}
 */
goog.events.BrowserEvent.MouseButton = {
  LEFT: 0,
  MIDDLE: 1,
  RIGHT: 2
};

we emit

  class BrowserEvent extends Event {
    isButton (a : BrowserEvent.MouseButton ) : boolean ;
    static MouseButton : BrowserEvent.MouseButton ;
  }

should be something like (if valid)

declare namespace goog.events {
class BrowserEvent {
  isButton (a: goog.events.BrowserEvent.MouseButton) {
}

declare namespace goog.events.BrowserEvent {
enum MouseButton {
 }
}