code: def draw(self):
          
          for age, level in enumerate(self.tree.get_branches()):
              if age in self.ages:
                  thickness = self._get_thickness(age)
                  color = self._get_color(age)
                  for branch in level:
                      self._draw_branch(branch, color, thickness, age)
docs: Draws the tree.
  
          Args:
              ages (array): Contains the ages you want to draw.