public com.google.protobuf.Timestamp getStartTime() {
      if (startTimeBuilder_ == null) {
        return startTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : startTime_;
      } else {
        return startTimeBuilder_.getMessage();
      }
    }
<pre>
Optional. The start time of the interval.
</pre>

<code>.google.protobuf.Timestamp start_time = 1 [(.google.api.field_behavior) = OPTIONAL];
</code>

@return The startTime.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/TimeInterval.java