@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (startTimingConstraintsCase_ == 1) {
        output.writeMessage(1, (com.google.protobuf.Duration) startTimingConstraints_);
      }
      if (startTimingConstraintsCase_ == 2) {
        output.writeMessage(2, (com.google.protobuf.Timestamp) startTimingConstraints_);
      }
      if (startTimingConstraintsCase_ == 3) {
        output.writeMessage(3, (com.google.protobuf.Duration) startTimingConstraints_);
      }
      if (startTimingConstraintsCase_ == 4) {
        output.writeMessage(4, (com.google.protobuf.Timestamp) startTimingConstraints_);
      }
      if (startTimingConstraintsCase_ == 5) {
        output.writeMessage(5, (com.google.type.Interval) startTimingConstraints_);
      }
      getUnknownFields().writeTo(output);
    }
<pre>
An absolute time interval within which resources may be created.
</pre>

<code>.google.type.Interval valid_interval = 5;</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/QueuedResource.java