[gef-dev] How to remove the border in NetworkEditor example?

[michaelsun@xxxxxxxxxx]

In the Network example of 
ftp://www.redbooks.ibm.com/redbooks/SG246302,

when open the NetworkEditor, there is a border around
the GraphicalViewer. How to remove it? In
NetworkPage.java, I can get the FigureCanvas from the
viewer.getControl(), but still can't get rid of it? 

Thanks,

Michael