code: def draw(self, axes):
                      
          ## create a toytree object from the treemix tree result
          tre = toytree.tree(newick=self.results.tree)
          tre.draw(
              axes=axes,
              use_edge_lengths=True,
              tree_style='c',
              tip_labels_align=True,
              edge_align_style={"stroke-width": 1}
          );
  
          ## get coords 
          for admix in self.results.admixture:
              ## parse admix event
              pidx, pdist, cidx, cdist, weight = admix
              a = _get_admix_point(tre, pidx, pdist)
              b = _get_admix_point(tre, cidx, cdist)
  
              ## add line for admixture edge
              mark = axes.plot(
                  a = (a[0], b[0]),
                  b = (a[1], b[1]),
                  style={"stroke-width": 10*weight,
                         "stroke-opacity": 0.95, 
                         "stroke-linecap": "round"}
              )
  
              ## add points at admixture sink
              axes.scatterplot(
                  a = (b[0]),
                  b = (b[1]),
                  size=8,
                  title="weight: {}".format(weight),
              )
  
          ## add scale bar for edge lengths
          axes.y.show=False
          axes.x.ticks.show=True
          axes.x.label.text = "Drift parameter"
          return axes
docs: Returns a treemix plot on a toyplot.axes object.