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

<code>
.google.protobuf.Timestamp valid_after_time = 4 [(.google.api.field_behavior) = OPTIONAL];
</code>

@return Whether the validAfterTime field is set.
java-tpu/proto-google-cloud-tpu-v2/src/main/java/com/google/cloud/tpu/v2/QueuedResource.java