process Turnstile {
    final int MAX = 20;
    Counter counter_;	
	
    public Turnstile(Counter counter) {
	
        counter_ =  counter;
     
    } // Turnstile
   
    public void body() {
        
        for (int i=0; i<MAX; i++) {
            counter_.incValue();		  
        } // for      
    
    } // body 

} // process Turnstile