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