Add stub for Dependency provider

src/dependency_injector/providers.pyi

@@ -42,6 +42,15 @@ class Delegate(Provider):
     def __call__(self, *args: Injection, **kwargs: Injection) -> Provider: ...
 
 
+class Dependency(Provider, Generic[T]):
+    def __init__(self, instance_of: Type[T]) -> None: ...
+    def __call__(self, *args: Injection, **kwargs: Injection) -> T: ...
+    @property
+    def provided(self) -> ProvidedInstance: ...
+    @property
+    def instance_of(self) -> Type[T]: ...
+    def provided_by(self, provider: Provider) -> OverridingContext: ...
+
 class Callable(Provider, Generic[T]):
     def __init__(self, provides: _Callable[..., T], *args: Injection, **kwargs: Injection) -> None: ...
     def __call__(self, *args: Injection, **kwargs: Injection) -> T: ...

tests/typing/dependency.py

@@ -0,0 +1,22 @@
+from typing import Type
+
+from dependency_injector import providers
+
+
+class Animal:
+    ...
+
+
+class Cat(Animal):
+
+    def __init__(self, *_, **__): ...
+
+
+# Test 1: to check the return type
+provider1 = providers.Dependency(instance_of=Animal)
+provider1.override(providers.Factory(Cat))
+var1: Animal = provider1()
+
+# Test 2: to check the return type
+provider2 = providers.Dependency(instance_of=Animal)
+var2: Type[Animal] = provider2.instance_of

tests/typing/factory.py

@@ -4,7 +4,6 @@ from dependency_injector import providers
 
 
 class Animal:
-    xyz: int = 123
     ...