InverseDegreeUpdateNormalization extends RelatedTweetUpdateNormalization { @Override public double computeLeftNeighborContribution(int leftNodeDegree) { return 1.0 / leftNodeDegree; }  @Override double computeLeftNeighborContribution(int leftNodeDegree); @Override double computeScoreNormalization(double cooccurrence, int similarNodeDegree,
      int nodeDegree);  }
@Test public void testComputeLeftNeighborContribution() { InverseDegreeUpdateNormalization inverseDegreeUpdateNormalization = new InverseDegreeUpdateNormalization(); assertEquals(0.5, inverseDegreeUpdateNormalization.computeLeftNeighborContribution(2), 0.01); }