class_docstr: A list of checkboxes with extra annotation, and a context menu.
  
  Designed as an alternative to NameSubscriberCombobox which simplifies selection of
  multiple items.
code: def select_none(self, evt):
      self.SetChecked([])
      self.checked = self.GetChecked()
      for cb in self.callbacks:
          cb(evt)
  
imports: import platform
  import wx
label_desc: Use image node_id 5 for calling the NameSubscriberListBox obj's underlying member method code with example usage: obj.select_none(evt) without return types