cluster_interval        Cluster ranges which are implemented as 2
                        equal-length numeric vectors.
genome_cluster          Intersect data frames based on chromosome,
                        start and end.
genome_complement       Calculates the complement to the intervals
                        covered by the intervals in a data frame. It
                        can optionally take a 'chromosome_size' data
                        frame that contains 2 or 3 columns, the first
                        the names of chromosome and in case there are 2
                        columns the size or first the start index and
                        lastly the end index on the chromosome.
genome_intersect        Intersect data frames based on chromosome,
                        start and end.
genome_join_closest     Join intervals on chromosomes in data frames,
                        to the closest partner
genome_subtract         Subtract one data frame from another based on
                        chromosome, start and end.
