I'll investigate on changes and I'll come back later on that... ;)

there is a checked inst var in PRCommand. I think I could use similarly an inst var, or a wrapper for timestamp to associated it with a boolean...
What would you do ?

Thanks

C├ędrick
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checked seems to be use only in PBComment...

PRCommand>>isChecked
    "Answer ==true== if the command should be checked before execution, e.g. the method ==#doValidate== should be executed at all."