Note: This PRState documentation is out-dated and is for an older (pre-GMS v2.3) version of PRState. For the most up-to-date docs on the latest version of PRState, please refer to this page as well as the documentation included in the PRState package.
Returns the object's previous state.
PRStatePrevious(obj) 
The object to get the previous state from.
The object's previous state name, or noone if none.