docs: def set_yticks_for_all(self, row_column_list=None, ticks=None):
          """Manually specify the y-axis tick values.
  
          :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
          :param ticks: list of tick values.
  
          """
          if row_column_list is None:
              self.ticks['y'] = ticks
          else:
              for row, column in row_column_list:
                  self.set_yticks(row, column, ticks)