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 get_choice_names(self):
      choice_names = [choice[0] for choice in self.choices]
      if self.checked != "None":
          for item in self.checked:
              if item not in choice_names:
                  choice_names.insert(0, item)
                  self.choices.insert(0, (item, None, 0, True))
      return choice_names
  
imports: import platform
  import wx
label_desc: Use image node_id 10 for calling the NameSubscriberListBox obj's underlying member method code with example usage: obj.get_choice_names() and returns: choice_names