if (this.terminationCriterion != null) {
// first propagate through termination Criterion. since it has no successors, it has no
// interesting properties
this.terminationCriterionRootConnection.setInterestingProperties(new InterestingProperties());
this.terminationCriterion.accept(new InterestingPropertyVisitor(estimator));
}
// we need to make 2 interesting property passes, because the root of the step function needs also
// the interesting properties as generated by the partial solution
// give our own interesting properties (as generated by the iterations successors) to the step function and
// make the first pass
this.rootConnection.setInterestingProperties(intProps);
this.nextPartialSolution.accept(new InterestingPropertyVisitor(estimator));
// take the interesting properties of the partial solution and add them to the root interesting properties
InterestingProperties partialSolutionIntProps = this.partialSolution.getInterestingProperties();
intProps.getGlobalProperties().addAll(partialSolutionIntProps.getGlobalProperties());
intProps.getLocalProperties().addAll(partialSolutionIntProps.getLocalProperties());
// clear all interesting properties to prepare the second traversal
// this clears only the path down from the next partial solution. The paths down
// from the termination criterion (before they meet the paths down from the next partial solution)
// remain unaffected by this step
this.rootConnection.clearInterestingProperties();
this.nextPartialSolution.accept(InterestingPropertiesClearer.INSTANCE);
// 2nd pass
this.rootConnection.setInterestingProperties(intProps);
this.nextPartialSolution.accept(new InterestingPropertyVisitor(estimator));
// now add the interesting properties of the partial solution to the input
final InterestingProperties inProps = this.partialSolution.getInterestingProperties().clone();
inProps.addGlobalProperties(new RequestedGlobalProperties());
inProps.addLocalProperties(new RequestedLocalProperties());