# Pastebin ecNETh5f
whereas generally , 

class TrackItem(TreeItem):

    def update(self, update_album=True):
        track = self.obj
        if track.num_linked_files == 1:
            file = track.linked_files[0]
            file.item = self
            color = TrackItem.track_colors[file.state]
            bgcolor = get_match_color(file.similarity, TreeItem.base_color)
            icon = FileItem.decide_file_icon(file)
            self.takeChildren()
        else:
            if track.ignored_for_completeness():
                color = TreeItem.text_color_secondary
            else:
                color = TreeItem.text_color
            bgcolor = get_match_color(1, TreeItem.base_color)
            if track.is_video():
                icon = TrackItem.icon_video
            elif track.is_data():
                icon = TrackItem.icon_data
            else:
                icon = TrackItem.icon_audio
            oldnum = self.childCount()
            newnum = track.num_linked_files
            if oldnum > newnum:  # remove old items
                for i in xrange(oldnum - newnum):
                    self.takeChild(newnum - 1).obj.item = None
                oldnum = newnum
            for i in xrange(oldnum):  # update existing items
                item = self.child(i)
                file = track.linked_files[i]
                item.obj = file
                file.item = item
                item.update()
            if newnum > oldnum:  # add new items
                items = []
                for i in xrange(newnum - 1, oldnum - 1, -1):
                    item = FileItem(track.linked_files[i], False)
                    item.update()
                    items.append(item)
                self.addChildren(items)
            self.setExpanded(True)
        self.setIcon(0, icon)
        for i, column in enumerate(MainPanel.columns):
            self.setText(i, track.column(column[1]))
            self.setForeground(i, color)
            self.setBackground(i, bgcolor)
        if self.isSelected():
            TreeItem.window.update_selection()
        import pudb; pudb.set_trace()              
     
        if update_album:
            self.parent().update(update_tracks=False)