code: public Key< Integer> start() {
  		final Key< Integer> object = new Key< Integer>();
  		consumers.put( object, new Consumer< Integer>() {
  			int count;
  			public void consume( final ByteBuffer buffer) { count += buffer.remaining(); }
  			public Integer finish() { return count; }
  		});
  		return object;
  	}
docs: Initializes a byte counter on this channel.
  @return reference to the new key added to the consumers