code: def _process_hist(self, hist):
          
          edges, hvals, widths, lims, isdatetime = super(SideHistogramPlot, self)._process_hist(hist)
          offset = self.offset * lims[3]
          hvals *= 1-self.offset
          hvals += offset
          lims = lims[0:3] + (lims[3] + offset,)
          return edges, hvals, widths, lims, isdatetime
docs: Subclassed to offset histogram by defined amount.