module Sketchup
class ModelObserver
    def onActivePathChanged
    end
    def onAfterComponentSaveAs
    end
    def onBeforeComponentSaveAs
    end
    def onDeleteModel
    end
    def onEraseAll
    end
    def onExplode
    end
    def onPlaceComponent
    end
    def onSaveModel
    end
    def onTransactionAbort
    end
    def onTransactionCommit
    end
    def onTransactionEmpty
    end
    def onTransactionRedo
    end
    def onTransactionStart
    end
    def onTransactionUndo
    end
end
end