code: public void assertThat(Ticker ticker, Sampler<Boolean> variable) {
          assertThat(variable, ticker, isQuietlyTrue());
      }
docs: Assert that a polled sample of the variable is {@code true}.
  <p>Example:</p>
  <pre>
  {@code
  
  Sampler<Boolean> theresAFlyInMySoup = ...;
  ...
  assertThat(eventually(), theresAFlyInMySoup);
  }