generateSequenceCohortSet
                        Intersecting the index and marker cohorts prior
                        to calculating Sequence Symmetry Ratios
mockCohortSymmetry      Creates mock cdm object for testing
plotSequenceRatios      A plot for the sequence ratios.
plotTemporalSymmetry    A plot for the temporal symmetry of cohorts.
summariseSequenceRatios
                        Sequence ratio calculations
summariseTemporalSymmetry
                        Summarise temporal symmetry
tableSequenceRatios     A formatted visualization of sequence_symmetry
                        objects.
tableTemporalSymmetry   A formatted visualization of temporal_symmetry
                        objects.
