Head. Wall. Bang. (imap fancy splitting)

[Tommy Kelly <tommy.kelly@verilab.com>]

I'm trying to get even a simple fancy split going, so I can build up my
understanding from there. But I can't even do that. I'm trying this
simple split:

(| "TEST-GROUP")

My understanding is, that will shove everything into group
TEST-GROUP. Yes? Here's how I'm using it:

(setq gnus-secondary-select-methods
      '(
	(nnimap "work"
		(nnimap-address "imap.gmail.com")
 	 	(nnimap-stream ssl)
		(nnimap-server-port 993)

		(nnimap-inbox "INBOX")
		(nnimap-split-methods nnimap-split-fancy)
		(nnimap-split-fancy (| "TEST-GROUP"))
	)
      )

I've also tried numerous combinations of:

(nnimap-split-methods 'nnimap-split-fancy)
(nnimap-split-methods "nnimap-split-fancy")

(nnimap-split-fancy '(| "TEST-GROUP"))
(nnimap-split-fancy ("TEST-GROUP"))
(nnimap-split-fancy "TEST-GROUP")
and even things like
(nnimap-split-fancy "(| \"TEST-GROUP\"))" and other such nonsense.

They all end up with backtraces, rough variations on:

Debugger entered--Lisp error: (wrong-type-argument listp nnimap-split-fancy)
  nnmail-article-group(nnimap-dummy-active-number nil nnimap-save-mail-spec)
  nnmail-check-duplication("<b459383cc64455a42e76ee18aaa86234@localhost.localdomain>" nnimap-save-mail-spec nnimap-dummy-active-number nnimap-save-mail-spec)
  nnmail-process-mmdf-mail-format(nnimap-save-mail-spec nnimap-dummy-active-number nnimap-save-mail-spec)
  nnmail-split-incoming(#<buffer *nnimap imap.gmail.com 993  *nntpd**> nnimap-save-mail-spec nil nil nnimap-dummy-active-number nnimap-save-mail-spec)
  nnimap-split-incoming-mail()
  ...


Could anyone please show me the correct syntax for this simple fancy (if that's
not an oxymoron) split?

thanks,
Tommy

P.S. I've tried it outside the select method stanza too, using setq, but
it's equally ineffective.