How to generate specific WAL records?

Hi,

Does anyone know how to generate the following WAL records from psql?

I'm now fixing pg_lesslog, which I reported a bug.   Now code is
almost okay and I'd like to add test tools to show pg_lesslog can
handle all the WAL record correctly.

XLOG_MULTIXACT_ZERO_OFF_PAGE
XLOG_MULTIXACT_ZERO_MEM_PAGE
XLOG_MULTIXACT_CREATE_ID
XLOG_HEAP_LOCK
XLOG_HEAP_INIT_PAGE
XLOG_BTREE_INSERT_META
XLOG_BTREE_DELETE_PAGE
XLOG_BTREE_DELETE_PAGE_META
XLOG_BTREE_DELETE_PAGE_HALF
XLOG_GIN_CREATE_PTREE
XLOG_GIN_SPLIT
XLOG_GIN_VACUUM_PAGE
XLOG_GIN_DELETE_PAGE
XLOG_GIN_DELETE_LISTPAGE
XLOG_GIST_PAGE_DELETE

So far, I'm using conventional BTREE,  btree_gin and btree_gist for
the test, as well as 2PC and savepoint.

Any information is welcome.

Thank you very much in advance;
------
Koichi Suzuki