@Override
        public void run() {
            LocalInstance<Integer, Integer> s = r.getLocalInstance();
            for (int i = 0; i < 500; ++i) {
                put(s, i);
            }
        }
Smoke test for multi producer data structure.

<p>
TODO sorely needs nastier cases
</p>

@author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
vespajlib/src/test/java/com/yahoo/concurrent/ThreadLocalDirectoryTestCase.java