extern xint $int$;

interface IOutParam {
  in void e_out(out xint number);
  behaviour {
    on e_out: {} 
  }
}

component OutParam {
  provides IOutParam outParam;

  behaviour
  {
    void fn(xint i) {
      nr = i;
    }
    xint nr;
    
    on outParam.e_out(number):
    {
      fn(number <- nr);
    }
  }
}