see the six DBIC debug messages similar to the following (where
N=1-6):
- SELECT author.id, author.first_name, author.last_name \
- FROM book_author me JOIN author author \
+ SELECT author.id, author.first_name, author.last_name
+ FROM book_author me JOIN author author
ON author.id = me.author_id WHERE ( me.book_id = ? ): 'N'
-(The '\' characters won't actually appear in the output -- we are
-using them as "line continuation markers" here.)
-
=head1 CONVERT TO A CHAINED ACTION