code: public <S,V> void assertThat(S subject, Feature<? super S, V> feature, Ticker ticker, Matcher<? super V> criteria) {
          assertThat(sampled(subject, feature), ticker, criteria);
      }
docs: Assert that a polled sample of the feature satisfies the criteria.
  <p>Example:</p>
  <pre>
  {@code
  
  Page searchResultsPage = ...;
  Feature<Page,Boolean> resultCount() { ... }
  Ticker withinTenSeconds = ...;
  ...
  assertThat(searchResultsPage, resultCount(), withinTenSeconds, is(greaterThan(9)));
  }