replaceVari.addSucceedingOperator(new OperatorIDTuple(secondFilter,0));
replaceVari.removeSucceedingOperator(connection.getOperatorIDTuple().getOperator());
startingOperator.addSucceedingOperator(new OperatorIDTuple(firstFilter,0));
startingOperator.removeSucceedingOperator(connection.getOperatorIDTuple().getOperator());
}
if(subjectIsALiteral && objectIsALiteral){
final Filter firstFilter = new Filter("(" + object + " = " + realObject + ")");
final Filter secondFilter = new Filter("(" + subject + " = " + realSubject + ")");