hmm . . . would this be more reasonable if we had a very compact way to create ByteStrings?

```
List<ByteString> responseHeaders = Arrays.asList(
    utf8(":status"), utf8("404"),
    utf8(":version"), utf8("HTTP/1.1"),
    utf8(":content-type"), utf8("text/plain"),
    ...
```

Hmmm .. . Looks like no!