human
Solve the following python programming problem given the following code:
def call(self, fn) : 
    def decorated_fn(* params) : 
        if (len (self.queue) < self.limit) : 
            self.queue.append ((fn, params)) 
            if (not self.processing_queue) : 
                self.process_queue () 
return fn 

    
    

    Fix the buggy line: return fn
assistant
#Here is Python program to fix the buggy line: return fn
.

return def decorated_fn(