lf1 = this.graphBuilder.getMoreFrequentLinkBetweenNodes(link.getSource().getLabel().getUri(), link.getTarget().getLabel().getUri()); sourceTargetLinkFrequency.put(key1, lf1); lf2 = this.graphBuilder.getMoreFrequentLinkBetweenNodes(link.getTarget().getLabel().getUri(), link.getSource().getLabel().getUri()); sourceTargetLinkFrequency.put(key2, lf2);