docs: def show_yticklabels_for_all(self, row_column_list=None):
          """Show the y-axis tick labels for all specified subplots.
  
          :param row_column_list: a list containing (row, column) tuples to
              specify the subplots, or None to indicate *all* subplots.
          :type row_column_list: list or None
  
          """
          if row_column_list is None:
              for subplot in self.subplots:
                  subplot.show_yticklabels()
          else:
              for row, column in row_column_list:
                  self.show_yticklabels(row, column)