### Question:
Message extends StructValue { public ValueFactory vf() { return vf; } Message( Type type, ValueFactory vf );  Message( Type type, ValueFactory vf, int length ); ValueFactory vf(); Message reply( Type rType ); Message reply(); Long getMessageId(); void setMessageId( Long msgid ); Long getInReplyTo(); void setInReplyTo( Long msgid );  }### Answer:
@Test public void getVf() { Message msg = new Message( mt1, vf ); assertSame( vf, msg.vf() ); }