docs: def InitSpecCheck(self):
          """
          make an interactive grid in which users can edit specimen names
          as well as which sample a specimen belongs to
          """
          #wait = wx.BusyInfo("Please wait, working...")
          #wx.SafeYield()
          self.contribution.propagate_lithology_cols()
          spec_df = self.contribution.tables['specimens'].df
          self.panel = wx.Panel(self, style=wx.SIMPLE_BORDER)
          self.grid_frame = grid_frame3.GridFrame(self.contribution, self.WD,
                                                  'specimens', 'specimens', self.panel,
                                                   main_frame=self.main_frame)
          # redefine default 'save & exit grid' button to go to next dialog instead
          self.grid_frame.exitButton.SetLabel('Save and continue')
          grid = self.grid_frame.grid
          self.grid_frame.Bind(wx.EVT_BUTTON,
                               lambda event: self.onContinue(event, grid, self.InitSampCheck),
                               self.grid_frame.exitButton)
  
              # add back button
          self.backButton = wx.Button(self.grid_frame.panel, id=-1, label='Back',
                                        name='back_btn')
          self.backButton.Disable()
          self.grid_frame.main_btn_vbox.Add(self.backButton, flag=wx.ALL, border=5)
          # re-do fit
          self.grid_frame.do_fit(None, self.min_size)
          # center
          self.grid_frame.Centre()
          return