`Tabs.Cleared` documentation a little ambiguous about textual HOT 3 CLOSED

╭──────────────────────────────────────────────── Traceback (most recent call last) ─────────────────────────────────────────────────╮
│ /Users/davep/develop/python/textual/../textual-sandbox/tabbed_content_message_testing.py:37 in empty_active                        │
│                                                                                                                                    │
│   34 │                                                                                        ╭────────── locals ──────────╮       │
│   35 │   @on(Button.Pressed, "#empty-active")                                                 │ self = WrapperForTesting() │       │
│   36 │   def empty_active(self) -> None:                                                      ╰────────────────────────────╯       │
│ ❱ 37 │   │   self.query_one(TabbedContent).active = ""                                                                             │
│   38 │                                                                                                                             │
│   39 │   @on(Button.Pressed, "#hide-all")                                                                                          │
│   40 │   def hide_all(self) -> None:                                                                                               │
│                                                                                                                                    │
│ /Users/davep/develop/python/textual/src/textual/widgets/_tabbed_content.py:345 in validate_active                                  │
│                                                                                                                                    │
│   342 │   │   │   ValueError: If the active attribute is set to empty string when there are ta ╭───────── locals ─────────╮        │
│   343 │   │   """                                                                              │ active = ''              │        │
│   344 │   │   if not active and self.get_child_by_type(ContentSwitcher).current:               │   self = TabbedContent() │        │
│ ❱ 345 │   │   │   raise ValueError("'active' tab must not be empty string.")                   ╰──────────────────────────╯        │
│   346 │   │   return active                                                                                                        │
│   347 │                                                                                                                            │
│   348 │   @staticmethod                                                                                                            │
╰────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
ValueError: 'active' tab must not be empty string.