Visualforce Developer Guide
jreset()
Forces the controller to reacquire access to newly referenced
fields. Any changes made to the record prior to this method call are
discarded.
Signature
public Void reset()
Return Value
Type: Void
Usage
This method is only used if addFields is called outside the constructor, and it must be called directly before addFields.
This method is only for controllers used by dynamicVisualforce bindings.