logic question about the rollback renpy command

[deltadidirac]

hi all,

I would understand correctly what mean this command because I'm not sure:

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renpy.suspended_rollback (True/False)

I clarify now...
if I use this command at the start of a generic label... :

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label generic:
        $ renpy.suspended_rollback(True)
        scene bg 1                                               ### this could be add or not
        "......."                                                    ### this could be add or not
        show screen alfa
        calls creen beta
        
############# and in another point , label or screen after I unblock the command with:

$ renpy.suspended_rollback(False)

1) it mean this example that all actions, or locations or history etc... stop and freeze at the moment before start the "generic label" (True), and after restart with the second command (False)?
2) or it mean simply that you can't go back with your mouse (True), untill you give the second command (False)?

I would like understand thery well this, because if the right answer is the 1) , so this command it is what I need;

on contrary I would like to know how block, or stop, for a moment, all the "memory" of renpy about the actions, locations, etc... before start the "generic label"; and after, when I need, write a command to restart this "memory" in another label or screen.

thanks