When running jasmine tests, how can I know if I am in a describe block, beforeEach block or it block?

I need to throw an exception if a utility is used outside of an 'it' or 'beforeEach' block in my tests. Example -

   describe('some test', function(){

     useUtil();     // should throw exception

     beforeEach(function(){
        useUtil()   // should work
     })

     it('should test something', function(){
        useUtil()   // should work
     }) 
   })

The util creates spies, and I want to make sure they are create in a way that allows Jasmine to clean them after every suite.