code: public <S> void assertThat(S subject, Ticker ticker, Feature<? super S, Boolean> feature) {
          assertThat(subject, feature, ticker, isQuietlyTrue());
      }
docs: Assert that a polled sample of the feature is {@code true}.
  <p>Example:</p>
  <pre>
  {@code
  
  Page settingsPage = ...;
  Feature<Page,Boolean> displayed() { ... }
  ...
  assertThat(settingsPage, eventually(), is(displayed()));
  }