cw <- new.CytoscapeWindow ('setDefaultNodeShape.test', graph=makeSimpleGraph())
displayGraph (cw)
redraw (cw)
layoutNetwork(cw, 'jgraph-spring')
legal.shapes <- getNodeShapes (cw)
# stopifnot ('diamond' %in% legal.shapes)
setDefaultNodeShape (cw, 'diamond')
redraw (cw)
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