code: def draw_on(self, canvas, stem_color, leaf_color, thickness, ages=None):
          
          if canvas.__module__ in SUPPORTED_CANVAS:
              drawer = SUPPORTED_CANVAS[canvas.__module__]
              drawer(self, canvas, stem_color, leaf_color, thickness, ages).draw()
docs: Draw the tree on a canvas.
  
          Args:
              canvas (object): The canvas, you want to draw the tree on. Supported canvases: svgwrite.Drawing and PIL.Image (You can also add your custom libraries.)
              stem_color (tupel): Color or gradient for the stem of the tree.
              leaf_color (tupel): Color for the leaf (= the color for last iteration).
              thickness (int): The start thickness of the tree.