def toLily(self):
        '''
        Method which converts the object instance, its attributes and children to a string of lilypond code

        :return: str of lilypond code
        '''

        lilystring = ""
        children = self.GetChildrenIndexes()
        total = self.note_total
        counter = 0
        for child in range(len(children)):
            note = self.GetChild(children[child])
            item = note.GetItem()
            if item is not None:
                item.autoBeam = self.autoBeam
            if hasattr(note, "duration"):
                try:
                    counter += int(note.duration)
                except:
                    if note.duration == "\\longa":
                        counter += 0.25
                    if note.duration == "\\breve":
                        counter += 0.5
            if counter > total / 2:
                if hasattr(self, "mid_barline"):
                    lilystring += self.mid_barline.toLily()
                    self.__delattr__("mid_barline")
            if hasattr(self, "rest") and hasattr(self, "total"):
                lilystring += "R" + self.total
            else:
                lilystring += note.toLily() + " "
        return lilystring
Method which converts the object instance, its attributes and children to a string of lilypond code

        :return: str of lilypond code