pg_dump Add dumping of comments on index columns

Hi.
I found a TODO item "Add dumping of comments on index columns and
composite type columns" for pg_dump
and want to write a patch for it.

But I'm not sure if I understand the problem correctly.
Does "Add dumping of comments on index columns" mean that
pg_dump should dump out COMMENT statements like following?
COMMENT ON COLUMN some_index.index_column1 IS 'Hello column1';

Can anybody give me some advice on this?

Best regards,

-----
Taro Minowa(Higepon)

http://www.monaos.org/
http://code.google.com/p/mosh-scheme/