@java.lang.Override
    public com.google.protobuf.TimestampOrBuilder getValidAfterTimeOrBuilder() {
      if (startTimingConstraintsCase_ == 4) {
        return (com.google.protobuf.Timestamp) startTimingConstraints_;
      }
      return com.google.protobuf.Timestamp.getDefaultInstance();
    }
<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>
java-tpu/proto-google-cloud-tpu-v2/src/main/java/com/google/cloud/tpu/v2/QueuedResource.java