def _getRenderTreeText(self):
        render_text = Node._getRenderTreeText(self)

        render_string = ['start: [x: {sx}, y: {sy}]'.format(sx=self.start_pos.x, sy=self.start_pos.y),
                         'end: [x: {ex}, y: {ey}]'.format(ex=self.end_pos.x, ey=self.end_pos.y)]