public static void _startEasing(Easing ease)
{
List<Easing> eGroup;
string easingGroup = ease.easingGroup;
if( activeEasings.ContainsKey( easingGroup ) )
eGroup = activeEasings[ easingGroup ];
else
eGroup = new List<Easing>();
ease.starting();
eGroup.Add( ease );
activeEasings[easingGroup] = eGroup;
}