public com.google.protobuf.Timestamp.Builder getValidAfterTimeBuilder() {
        return getValidAfterTimeFieldBuilder().getBuilder();
      }
<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