def redo(self): #returns nothing
        '''
        @todo:  Implement me!
        '''

        if track.sections.count() > 0:
            track.sections.remove(self.index)

    def undo(self): # returns nothing
        '''
        @todo:  Implement me!
        '''

        track.sections.insert(self.index)

    def execute(self): #returns nothing
        '''
        @todo:  Implement me!
        '''
        if track.sections.count() > 0:
            track.sections.remove(self.index)