code: def width_min(self, width_min):
          
  
          if width_min is None:
              self._width_limits[0] = 0
              return
  
          width_min = float(width_min)
          assert(0 <= width_min)
  
          self._width_limits[0] = width_min
          self._update_layout()
docs: Set the minimum height of the widget
  
          Parameters
          ----------
  
          height_min: float
              the minimum height of the widget