code: def set_baselines(self):
          
          if self.style.xbaseline:
              if self.style.orient in ("up", "down"):
                  self.coords.coords[:, 0] += self.style.xbaseline
                  self.coords.verts[:, 0] += self.style.xbaseline                
              else:
                  self.coords.coords[:, 1] += self.style.xbaseline
                  self.coords.verts[:, 1] += self.style.xbaseline
docs: Modify coords to shift tree position for x,y baseline arguments. This
          is useful for arrangeing trees onto a Canvas with other plots, but 
          still sharing a common cartesian axes coordinates.