code: def addSlider2D(
          self, sliderfunc, xmin, xmax, value=None, pos=4, s=0.04, title="", c=None, showValue=True
      ):
          
          return addons.addSlider2D(sliderfunc, xmin, xmax, value, pos, s, title, c, showValue)
docs: Add a slider widget which can call an external custom function.
  
          :param sliderfunc: external function to be called by the widget
          :param float xmin:  lower value
          :param float xmax:  upper value
          :param float value: current value
          :param list pos:  position corner number: horizontal [1-4] or vertical [11-14]
                              it can also be specified by corners coordinates [(x1,y1), (x2,y2)]
          :param str title: title text
          :param bool showValue:  if true current value is shown
  
          .. hint:: |sliders| |sliders.py|_