@Override
    public boolean cancel(boolean mayInterruptIfRunning) {
        return out.cancel(mayInterruptIfRunning);
    }
<p>Constructs a new FastContentOutputStream that writes into the given {@link FastContentWriter}.</p>

@param out The ContentWriter to write the stream into.
jdisc_core/src/main/java/com/yahoo/jdisc/handler/FastContentOutputStream.java