clusterFoldSimilarity   Calculate cluster similarity between clusters
                        from different single cell samples.
findCommunitiesSimmilarity
                        Find cell-group communities by constructing and
                        clustering a directed graph using the
                        similarity values calculated by
                        ClusterFoldSimilarity()
plotClustersGraph       Creates a graph plot using the similarity
                        values calculated with ClusterFoldSimilarity().
similarityHeatmap       Plot a heatmap of the similarity values
                        obtained using cluster fold similarity
