// create the connection between subject and object operator with the
// right predicate item...
final Connection<Operator> connectionMode = new QueryConnection(
this.visualEditor);
connectionMode.setConnectionContent(predicateItem);
connectionMode.addOperator(subjectOp);
connectionMode.addOperator(this.op);
// sort elements of the outer reference...
final OperatorContainer opContainer = (OperatorContainer) this.queryGraph.outerReference
.getOperator();