static void Init()
{
// Get existing open window or if none, make a new one:
LevelBuilderWindow window = (LevelBuilderWindow)EditorWindow.GetWindow(typeof(LevelBuilderWindow));
window.Show();
}
public static void Open()
{
windowInstance = GetWindow <LevelBuilderWindow>(false, "Level Builder");
windowInstance.Show();
windowInstance.Focus();
}