The method getJFSIndexRepository() is undefined for the type CAS

[vijay vijay]

HI
         i am getting an error like this  "The method
getJFSIndexRepository() is undefined for the type CAS""
here i have imported JFSIndexRepository also.
i have given codew like this

JFSIndexRepository indexes = aCAS.getJFSIndexRepository();

FSIndex roomNumberIndex = indexes.getAnnotationIndex(TestType.*type*);

can any one guide me

vijay