Is there a hook named hook_heartbeat_register_streams? documentation error ?

Hello, there,
Firstly thanks for your great modules.
I just ported one site from d6 to d7, one big porting work is the heatbeat.
In heartbeat 6.x , my customized module can call hook_heartbeat_register_access_types to create some new streams. it works well.
However, after moved to heartbeat 7.x, based on the documentation( see here http://heartbeat.menhireffect.be/page/activity-streams), I should use the hook_heartbeat_register_streams, unfortunately, this doesn't work, I an even not able to find this hook in heartbeat module.

Could you help to check this issues ? or give me a right direction to create a new stream in my customized module ?

Thanks in Advance .
Devin