public RawTile getTile(FlatNode str) { if (SIRassignment == null) {
public RawTile getTile(SIROperator str) { if (SIRassignment == null)
    public RawTile getTile(FlatNode str) {        if (SIRassignment == null) {            return null;        }        return (RawTile) SIRassignment.get(str.contents);    }