This document provides information on plugin features that are designed for Mockito framework integration, rather than for Mockito features used by everyday users.
All these features are disabled by default, and they have to be enabled manually in case of Mockito integration.
According to the javadoc of the @NotExtensible annotation, it
Indicates to the user that she should not provide custom implementations of given type.
The inspection is applied to interfaces and named classes that can inherit from other types.
