1050
1050
build-parent of the version, i.e. the leftmost ancestor.
1051
1051
Will be None if the record is not a delta.
1054
1058
# key = component_id, r = record_details, i_m = index_memo, n = next
1055
1059
records = [(key, i_m) for key, (r, i_m, n)
1056
1060
in position_map.iteritems()]