code: def _get_stats_column_names(cls):
          
          columns = []
          stats = ('num_bytes', 'num_rows', 'location', 'partitioning_type',
                   'clustering_fields')
          stat_components = ('label', 'value', 'description', 'include')
          for stat_id in stats:
              for stat_component in stat_components:
                  columns.append('stats:{}:{}'.format(stat_id, stat_component))
          return tuple(columns)
docs: Construct a tuple of the column names for stats. Each stat has 4
          columns of data.