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<pre>public interface <span class="typeNameLabel">ClockProvider</span></pre>
<div class="block">Contract for obtaining the <a href="https://docs.oracle.com/javase/8/docs/api/java/time/Clock.html?is-external=true" title="class or interface in java.time"><code>Clock</code></a> used as the reference for <code>now</code> when
 validating the <code>@Future</code> and <code>@Past</code> constraints.
 <p>
 The default implementation will return the current system time. Plugging in custom
 im