Where to find kind code for STATISTIC_KIND GEOMETRY?

Hi All,

I am looking for the kind code for STATISTIC_KIND GEOMETRY to calculate
the selectivity/stats for geometry type (st_geometry).

According to PostgreSQL (pg_statistic.h)

* The present allocation of "kind" codes is:
*
* 1-99: reserved for assignment by the core PostgreSQL
project
* (values in this range will be documented in this
file)
* 100-199: reserved for assignment by the PostGIS project
* (values to be documented in PostGIS
documentation)
* 200-9999: reserved for future public assignments
*
* For private use you may choose a "kind" code at random in the range
* 10000-30000. However, for code that is to be widely disseminated it
is
* better to obtain a publicly defined "kind" code by request from the
* PostgreSQL Global Development Group.
*/

Wondering where I can find the "kind" codes for this new st_geometry
type?

Thanks.

Ale Raza