public void RemoveEventListener(ProgressElementEvents type, Action listener, bool capture)
 {
 }
 public void RemoveEventListener(ProgressElementEvents type, HtmlEventHandler listener)
 {
 }
 public void RemoveEventListener(ProgressElementEvents type, Action listener)
 {
 }
 public void AddEventListener(ProgressElementEvents type, IEventListener listener, bool capture)
 {
 }
 public void AddEventListener(ProgressElementEvents type, IEventListener listener)
 {
 }
 public void AddEventListener(ProgressElementEvents type, HtmlEventHandlerWithTarget<ProgressElement> listener, bool capture)
 {
 }
 public void RemoveEventListener(ProgressElementEvents type, HtmlEventHandlerWithTarget<ProgressElement> listener)
 {
 }