graph.addCells(new Object[] { vertex }, dropTarget);
}
double x = graph.snap(e.getX());
double y = graph.snap(e.getY());
// FIXME: Here we pre-create the state for the vertex to be
// inserted in order to invoke update in the connectPreview.
// This means we have a cell state which should be created
// after the model.update, so this should be fixed.