Updated wording

Nyholm · Nyholm · commit 196692f1750b · 2021-03-31T09:46:07.000+02:00
diff --git a/reference/constraints/Callback.rst b/reference/constraints/Callback.rst
@@ -253,9 +253,10 @@ constructor of the Callback constraint::
 
 .. warning::
 
-    When you are using a ``Closure`` or anonymous function, they cannot be cached
-    like other annotations. For best performance, it is recommended to use a static
-    callback method.
+    Using a ``Closure`` together with annotation configuration will disable the
+    annotation cache for that class/property/methods because ``Closure``s cannot
+    be cached. For best performance, it is recommended to use a static callback
+    method.
 
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