pg_replication_origin_xact_reset() and its argument variables

Hi,

The document explains that pg_replication_origin_xact_reset() doesn't have
any argument variables. But it's been actually defined so as to have two
argument variables with pg_lsn and timestamptz data types, as follows.

=# \df pg_replication_origin_xact_reset
List of functions
Schema | Name | Result data type |
Argument data types | Type
------------+----------------------------------+------------------+----------------------------------+--------
pg_catalog | pg_replication_origin_xact_reset | void |
pg_lsn, timestamp with time zone | normal

As far as I read the code of the function, those arguments don't seem to
be necessary. So I'm afraid that the pg_proc entry for the function might
be incorrect and those two arguments should be removed from the definition.
Is this analysis right?

Regards,

--
Fujii Masao