如何在ObjectListView中对项目进行分组？

import wx
from ObjectListView import ObjectListView, ColumnDefn

class MyFrame(wx.Frame):
    def __init__(self, parent):
        wx.Frame.__init__(self, parent)
        
        self.objectListView = ObjectListView(self, style=wx.LC_REPORT|wx.SUNKEN_BORDER)
        self.objectListView.SetColumns([
            ColumnDefn("Name", "left", 150, "name"),
            ColumnDefn("Age", "left", 100, "age"),
            ColumnDefn("Group", "left", 100, "group"),
        ])
        
        self.objectListView.SetObjects([
            {"name": "John", "age": 25, "group": "Group A"},
            {"name": "Jane", "age": 30, "group": "Group B"},
            {"name": "Bob", "age": 35, "group": "Group A"},
            {"name": "Alice", "age": 28, "group": "Group B"},
        ])
        
        self.objectListView.BuildGroups("group")
        
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.objectListView, 1, wx.EXPAND)
        self.SetSizer(sizer)
        
app = wx.App()
frame = MyFrame(None)
frame.Show()
app.MainLoop()