private void InstantiateLists()
{
mElementsInList = new PositionedObjectList<ElementRuntime>();
mContainedElements = new PositionedObjectList<ElementRuntime>();
mEntireScenes = new Dictionary<string, Scene>();
mEntireShapeCollections = new Dictionary<string, ShapeCollection>();
mEntireNodeNetworks = new Dictionary<string, NodeNetwork>();
mEntireEmitterLists = new Dictionary<string, EmitterList>();
mEntireSplineLists = new Dictionary<string, SplineList>();
mCustomVariables = new List<PropertyValuePair>();
}