bytecode wildcards

public void process3(java.util.List<?>);
    Code:
       0: aload_1
       1: invokeinterface #2,  1    // InterfaceMethod java/util/List.iterator:()Ljava/util/Iterator;
       6: astore_2
       7: aload_2
       8: invokeinterface #3,  1    // InterfaceMethod java/util/Iterator.hasNext:()Z
      13: ifeq          31
      16: aload_2
      17: invokeinterface #4,  1    // InterfaceMethod java/util/Iterator.next:()Ljava/lang/Object;
      22: astore_3
      23: aload_3
      24: invokevirtual #5          // Method java/lang/Object.toString:()Ljava/lang/String;
      27: pop
      28: goto          7
      31: return