title: assertEquals problems (object object) (long long)
body: <pre><code>Interval&lt;Integer&gt; interval1 = Intervals.open(3, 6);
  </code></pre>
  
  <p>Here <code>3</code> is the lower bound, and <code>6</code> is the upper bound.</p>
  
  <pre><code>assertEquals(interval1.lowerBound(), 3);
  </code></pre>
  
  <p>After writing the test, there is a red underline saying:</p>
  
  <pre><code>ambiguous method call.Both assertEquals(object, object) assertEquals(long, long)
  </code></pre>