no longer required

src/textual/_app_children_view.py

@@ -1,86 +0,0 @@
-from __future__ import annotations
-
-import sys
-from typing import TYPE_CHECKING, Any, Iterator, Sequence, overload
-from weakref import ref
-
-import rich.repr
-
-if TYPE_CHECKING:
-    from .app import App
-    from .widget import Widget
-
-
-class AppChildrenView(Sequence["Widget"]):
-    """Presents a view of the App's children which contains only the current screen."""
-
-    def __init__(self, app: App) -> None:
-        self._app = ref(app)
-
-    @property
-    def app(self) -> App | None:
-        return self._app()
-
-    @property
-    def _updates(self) -> int:
-        app = self.app
-        assert app is not None
-        return app.children._updates
-
-    @property
-    def _nodes(self) -> Sequence[Widget]:
-        app = self.app
-        if app is None:
-            return []
-        from .app import ScreenError
-
-        try:
-            return [app.screen]
-        except ScreenError:
-            return []
-
-    def __bool__(self) -> bool:
-        return bool(self._nodes)
-
-    def __length_hint__(self) -> int:
-        return 1
-
-    def __rich_repr__(self) -> rich.repr.Result:
-        yield self._nodes
-
-    def __len__(self) -> int:
-        return len(self._nodes)
-
-    def __contains__(self, widget: object) -> bool:
-        return widget in self._nodes
-
-    def index(self, widget: Any, start: int = 0, stop: int = sys.maxsize) -> int:
-        """Return the index of the given widget.
-
-        Args:
-            widget: The widget to find in the node list.
-
-        Returns:
-            The index of the widget in the node list.
-
-        Raises:
-            ValueError: If the widget is not in the node list.
-        """
-        return self._nodes.index(widget, start, stop)
-
-    def __iter__(self) -> Iterator[Widget]:
-        return iter(self._nodes)
-
-    def __reversed__(self) -> Iterator[Widget]:
-        return reversed(self._nodes)
-
-    @overload
-    def __getitem__(self, index: int) -> Widget:
-        ...
-
-    @overload
-    def __getitem__(self, index: slice) -> list[Widget]:
-        ...
-
-    def __getitem__(self, index: int | slice) -> Widget | list[Widget]:
-        return list(self._nodes)[index]