@java.lang.Override
      public boolean hasValidAfterTime() {
        return startTimingConstraintsCase_ == 4;
      }
<pre>
An absolute time at which resources may be created.
</pre>

<code>.google.protobuf.Timestamp valid_after_time = 4;</code>

@return Whether the validAfterTime field is set.
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/QueuedResource.java