/**
* Initializes the drawing data from the escher record read in
*/
private void initialize()
{
EscherRecordData er = new EscherRecordData(this, 0);
Assert.verify(er.isContainer());
escherData = new EscherContainer(er);
Assert.verify(escherData.getLength() == drawingData.Length);
Assert.verify(escherData.getType() == EscherRecordType.DGG_CONTAINER);
initialized = true;
}
