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 GetChecked(self):
      checked_indexes = self.list_dlg.GetCheckedItems()
      named_items = [self.choice_names[i] for i in checked_indexes]
      return named_items
  
imports: import platform
  import wx
label_desc: Use image node_id 13 for calling the NameSubscriberListBox obj's underlying member method code with example usage: obj.GetChecked() and returns: named_items