public void Pop()
{
if (Empty())
{
JDebugger.Log(this, "PanelStackManager Is Empty");
return;
}
int lastIdx = _popupStack.Count - 1;
UIPanel popup = _popupStack[lastIdx].GetComponent <UIPanel>();
popup.StartClosePopup();
popup.ClosePopup();
_popupStack.RemoveAt(lastIdx);
}