Add __slots__ to third-party packages using stubdefaulter (#14619)

stubs/boltons/boltons/dictutils.pyi

@@ -51,6 +51,7 @@ class FastIterOrderedMultiDict(OrderedMultiDict[_KT, _VT]):  # undocumented
     def iterkeys(self, multi: bool = False) -> Generator[_KT, None, None]: ...
 
 class OneToOne(dict[_KT, _VT]):
+    __slots__ = ("inv",)
     inv: OneToOne[_VT, _KT]
     def clear(self) -> None: ...
     def copy(self) -> Self: ...
@@ -87,6 +88,7 @@ def subdict(d: dict[_KT, _VT], keep: Iterable[_KT] | None = None, drop: Iterable
 class FrozenHashError(TypeError): ...  # undocumented
 
 class FrozenDict(dict[_KT, _VT]):
+    __slots__ = ("_hash",)
     def __copy__(self) -> Self: ...
     @classmethod
     def fromkeys(cls, keys: Iterable[_KT], value: _VT | None = None) -> Self: ...  # type: ignore[override]

stubs/boltons/boltons/mathutils.pyi

@@ -12,6 +12,7 @@ def floor(x: float, options: None = None) -> int: ...
 def floor(x: float, options: Iterable[float]) -> float: ...
 
 class Bits:
+    __slots__ = ("val", "len")
     val: int
     len: int
     def __init__(self, val: int | list[bool] | str | bytes = 0, len_: int | None = None) -> None: ...

stubs/boltons/boltons/setutils.pyi

@@ -59,6 +59,7 @@ class IndexedSet(MutableSet[Any]):
 def complement(wrapped: Iterable[Any]) -> _ComplementSet: ...
 
 class _ComplementSet:
+    __slots__ = ("_included", "_excluded")
     def __init__(
         self, included: set[Any] | frozenset[Any] | None = None, excluded: set[Any] | frozenset[Any] | None = None
     ) -> None: ...

stubs/boltons/boltons/tbutils.pyi

@@ -4,6 +4,7 @@ from typing import Any, Generic, Literal, TypeVar
 from typing_extensions import Self
 
 class Callpoint:
+    __slots__ = ("func_name", "lineno", "module_name", "module_path", "lasti", "line")
     func_name: str
     lineno: int
     module_name: str