code: def tooltip(self, val):
      self._bmp_btn.SetToolTip(val)
  
imports: import wx
  import wx.lib.mixins.gridlabelrenderer
  from cellprofiler.icons import get_builtin_image
label_desc: Use image node_id 5 for calling the CornerLabelRenderer obj's underlying member method code with example usage: obj.tooltip(val) without return types