public Builder setValidUntilTime(com.google.protobuf.Timestamp value) {
        if (validUntilTimeBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          startTimingConstraints_ = value;
          onChanged();
        } else {
          validUntilTimeBuilder_.setMessage(value);
        }
        startTimingConstraintsCase_ = 2;
        return this;
      }
<pre>
Optional. An absolute time after which resources should not be created.
If the request cannot be fulfilled by this time the request will be
failed.
</pre>

<code>
.google.protobuf.Timestamp valid_until_time = 2 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-tpu/proto-google-cloud-tpu-v2/src/main/java/com/google/cloud/tpu/v2/QueuedResource.java