docs: def getBottomLeft(self):
          """
          Retrieves the the bottom left coordinate of the line as tuple.
          Coordinates must be numbers.
          """
          x1 = float(self.get_x1())
          x2 = float(self.get_x2())
          y1 = float(self.get_y1())
          y2 = float(self.get_y2())
          if x1 < x2:
              if y1 < y2:
                  return (x1, y1)
              else:
                  return (x1, y2)
          else:
              if y1 < y2:
                  return (x2, y1)
              else:
                  return (x2, y2)