pg_proc.prosrc -> can I see the function's source?

Hi all,

When I look at the entry of a pg_prc_row, I get the prosrc column. Does
that represent the id of the source of this function? Can I retrieve it
somewhere and take a look at it without pgdump -s (didn't try it yet,
but read in the archives that this would be a solution)?

Example:

select proname,prosrc from pg_proc where proname='RI_FKey_noaction_del';
proname | prosrc
----------------------+----------------------
RI_FKey_noaction_del | RI_FKey_noaction_del
(1 row)

Thanks for your help!

Raph