src/Buttons/BetterButton_Rollback.php
public function shouldDisplay()
    {
        return $this->gridFieldRequest->record->stagesDiffer('Stage', 'Live')
            && $this->gridFieldRequest->recordIsPublished()
            && $this->gridFieldRequest->record->canEdit();
    }
public function shouldDisplay()
    {
        return $this->gridFieldRequest->record->stagesDiffer('Stage', 'Live')
            && $this->gridFieldRequest->recordIsPublished()
            && $this->gridFieldRequest->record->canEdit();
    }
Determines if the button should display
@return boolean