get_bh_threshold        Data-driven threshold of Benjamini Hochberg
                        Procedure
groups_by_filter        Stratify hypotheses based on increasing value
                        of the covariate
ihw.default             ihw: Main function for Independent Hypothesis
                        Weighting
ihw.DESeqResults        ihw.DESeqResults: IHW method dispatching on
                        DESeqResults objects
ihwResult-class         An S4 class to represent the ihw output.
plot,ihwResult-method   Plot functions for IHW
