assertFalse(channel.isEmpty());
assertEquals(b,channel.get(2));
assertNull(channel.get(1));
channel.put(1, a); //check if this is in domain.
channel = new MutableTypedSideChannel<String>(keys.clone(), new String[]{null,b,c});
assertFalse(channel.isEmpty());
assertEquals(b,channel.get(2));
assertNull(channel.get(1));
assertNull(channel.get(3));
channel.put(1, a); //check if this is in domain.