assert chisioSource != null && chisioTarget != null;
// Create the edge as chisio does.
EdgeModel chisioEdge = new EdgeModel();
CreateConnectionCommand command = new CreateConnectionCommand();
command.setSource(chisioSource);
command.setTarget(chisioTarget);
command.setConnection(chisioEdge);
command.execute();
}
return chisioRoot;
}