Update static providers docs

docs/providers/static.rst

@@ -4,10 +4,10 @@ Static providers
 Static providers are family of providers that return their values "as is".
 There are four types of static providers:
 
-    - ``Class``
-    - ``Object``
-    - ``Function``
-    - ``Value``
+    - ``di.Class``
+    - ``di.Object``
+    - ``di.Function``
+    - ``di.Value``
 
 All of them have the same behaviour, but usage of anyone is predicted by
 readability and providing object's type.

examples/providers/static.py

@@ -1,23 +1,20 @@
 """`Static` providers example."""
 
-from dependency_injector.providers import Class
-from dependency_injector.providers import Object
-from dependency_injector.providers import Function
-from dependency_injector.providers import Value
+import dependency_injector as di
 
 
 # Provides class - `object`:
-cls_provider = Class(object)
+cls_provider = di.Class(object)
 assert cls_provider() is object
 
 # Provides object - `object()`:
-object_provider = Object(object())
+object_provider = di.Object(object())
 assert isinstance(object_provider(), object)
 
 # Provides function - `len`:
-function_provider = Function(len)
+function_provider = di.Function(len)
 assert function_provider() is len
 
 # Provides value - `123`:
-value_provider = Value(123)
+value_provider = di.Value(123)
 assert value_provider() == 123