Update docs to describe condition where request.dispatch cannot be honored in _cp_config. Ref
@@ -266,7 +266,10 @@ attached that config to a class which contains the page method:
This behavior is only guaranteed for the default dispatcher. Other
dispatchers may have different restrictions on where you can attach
- ``_cp_config`` attributes.
+ ``_cp_config`` attributes. Additionally, because the dispatcher is
+ is responsible for processing ``_cp_config``, it is not possible to
+ change the dispatcher (i.e. ``request.dispatch`` is not honored at
+ this construct).
This technique allows you to:
