widget framework: conf/xfer methods

there are multiple methods available for conferencing and transferring a call - for example, for "singlestepConference" there is just plain singleStepConference(), and then ...ToTeam(), ...ToService() and ...ToUser()

What is the difference between these? for "just plain" the parameter is "address" which I would guess means a E164 or SIP URI... for ...ToService() the parameter is "serviceID" - what is that? for ...ToTeam() the parameter is "address" - is this a reference to an AXP group? what happens if i conference a group? ...ToUser() has "userHandle" as the parameter - is this the agent login ID?

the example code in the documentation just shows a '3156' as the parameter in every case, so that is not a help.

Can someone explain what these all do, and what the intended behavior is in each case? Providing a link to a confluence page that explains it would be sufficient...

thanks