first version finished

django/utils/tree.pyi

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+from django.db.models.query_utils import Q
+from django.db.models.sql.where import WhereNode
+from typing import (
+    Any,
+    Dict,
+    Optional,
+    Tuple,
+)
+
+
+class Node:
+    def __bool__(self) -> bool: ...
+    def __contains__(self, other: Tuple[str, int]) -> bool: ...
+    def __deepcopy__(self, memodict: Dict[Any, Any]) -> Q: ...
+    def __eq__(self, other: Any) -> bool: ...
+    def __hash__(self) -> int: ...
+    def __init__(self, children: Any = ..., connector: Optional[str] = ..., negated: bool = ...) -> None: ...
+    def __len__(self) -> int: ...
+    def __repr__(self) -> str: ...
+    def __str__(self) -> str: ...
+    @classmethod
+    def _new_instance(
+        cls,
+        children: Any = ...,
+        connector: str = ...,
+        negated: bool = ...
+    ) -> WhereNode: ...
+    def add(self, data: Any, conn_type: str, squash: bool = ...) -> Any: ...
+    def negate(self) -> None: ...