The JAVADOC for isAssignableFrom states :
Determines if the class or interface represented by this
* {@code Class} object is either the same as, or is a superclass or
* superinterface of, the class or interface represented by the specified
* {@code Class} parameter.

x.isAssignableFrom(y) -> is x >= y ?
so in our check y should be the scanned controller class and x the ApiDocumentClass
Merge pull request #13 from mzruya/master

Scanned ApiDocumentationController is not excluded in the processControllers method