public com.google.protobuf.Duration.Builder getTravelDurationBuilder() {
        bitField0_ |= 0x00000002;
        onChanged();
        return getTravelDurationFieldBuilder().getBuilder();
      }
<pre>
The number of seconds required to travel to the job location from the
query location. A duration of 0 seconds indicates that the job isn't
reachable within the requested duration, but was returned as part of an
expanded query.
</pre>

<code>.google.protobuf.Duration travel_duration = 2;</code>
java-talent/proto-google-cloud-talent-v4beta1/src/main/java/com/google/cloud/talent/v4beta1/SearchJobsResponse.java