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Last updated at 5:32 pm UTC on 29 March 2017
Class comment:

I am used to execute a once-only command. My first use was in loading/saving the current project. In such cases it is necessary to be in another project to do the actual work. So an instance of me is added to a new world/project and that project is entered. I do my stuff (save/load followed by a re-enter of the previous project) and everyone is happy.