to relax I started to curve out projectHistory and I found that. So for sure pharo will be cool. enter: returningFlag revert: revertFlag saveForRevert: saveForRevert "Install my ChangeSet, Transcript, and scheduled views as current globals. If returningFlag is true, we will return to the project from whence the current project was entered; don't change its previousProject link in this case. If saveForRevert is true, save the ImageSegment of the project being left. If revertFlag is true, make stubs for the world of the project being left. If revertWithoutAsking is true in the project being left, then always revert." | recorderOrNil old forceRevert response seg | (world isKindOf: StringMorph) ifTrue: [self inform: 'This project is not all here. I will try to load a complete version.' translated. ^ true]. self isCurrentProject ifTrue: [^ self]. "Check the guards" guards ifNotNil: [guards := guards reject: [:obj | obj isNil]. guards do: [:obj | obj okayToEnterProject ifFalse: [^ self]]]. CurrentProject world triggerEvent: #aboutToLeaveWorld. forceRevert := false. CurrentProject rawParameters ifNil: [revertFlag ifTrue: [^ self inform: 'nothing to revert to' translated]] ifNotNil: [saveForRevert ifFalse: [forceRevert := CurrentProject projectParameters at: #revertWithoutAsking ifAbsent: [false]]]. forceRevert not & revertFlag ifTrue: [response := self confirm: 'Are you sure you want to destroy this Project\ and revert to an older version?\\(From the parent project, click on this project''s thumbnail.)' translated withCRs. response ifFalse: [^ self]]. revertFlag | forceRevert ifTrue: [seg := CurrentProject projectParameters at: #revertToMe ifAbsent: [^ self inform: 'nothing to revert to' translated]] ifFalse: [ CurrentProject makeThumbnail. returningFlag == #specialReturn ifTrue: [ Project forget: CurrentProject] ifFalse: []]. revertFlag | saveForRevert | forceRevert ifFalse: [(Preferences valueOfFlag: #projectsSentToDisk) ifTrue: [self storeToMakeRoom]]. CurrentProject abortResourceLoading. CurrentProject saveProjectPreferences. "Update the display depth and make a thumbnail of the current project" CurrentProject displayDepth: Display depth. old := CurrentProject. "for later" "Show the project transition. Note: The project zoom is run in the context of the old project, so that eventual errors can be handled accordingly" displayDepth == nil ifTrue: [displayDepth := Display depth]. self installNewDisplay: Display extent depth: displayDepth. (self showZoom) ifTrue: [self displayZoom: CurrentProject parent ~~ self]. (world isMorph and: [world hasProperty: #letTheMusicPlay]) ifTrue: [world removeProperty: #letTheMusicPlay] ifFalse: [Smalltalk at: #ScorePlayer ifPresentAndInMemory: [:playerClass | playerClass allSubInstancesDo: [:player | player pause]]]. returningFlag == #specialReturn ifTrue: [old removeChangeSetIfPossible. "keep this stuff from accumulating" nextProject := nil] ifFalse: [returningFlag ifTrue: [nextProject := CurrentProject] ifFalse: [previousProject := CurrentProject]]. CurrentProject saveState. CurrentProject isolationHead == self isolationHead ifFalse: [self invokeFrom: CurrentProject]. CurrentProject := self. self installProjectPreferences. ChangeSet newChanges: changeSet. TranscriptStream newTranscript: transcript. Sensor flushKeyboard. recorderOrNil := World pauseEventRecorder. ProjectHistory remember: CurrentProject. World := world. "Signifies Morphic" world install. "(revertFlag | saveForRevert | forceRevert) ifFalse: [ (Preferences valueOfFlag: #projectsSentToDisk) ifTrue: [ self storeSomeSegment]]." recorderOrNil ifNotNil: [recorderOrNil resumeIn: world]. saveForRevert ifTrue: [Smalltalk garbageCollect. "let go of pointers" old storeSegment. "result :=" old world isInMemory ifTrue: ['Can''t seem to write the project.'] ifFalse: [old projectParameters at: #revertToMe put: old world xxxSegment clone]. 'Project written.']. "original is for coming back in and continuing." revertFlag | forceRevert ifTrue: [seg clone revert]. "non-cloned one is for reverting again later" self removeParameter: #exportState. "Complete the enter: by launching a new process" world triggerEvent: #aboutToEnterWorld. Project spawnNewProcessAndTerminateOld: true