public com.google.protobuf.TimestampOrBuilder getStartTimeOrBuilder() {
        if (startTimeBuilder_ != null) {
          return startTimeBuilder_.getMessageOrBuilder();
        } else {
          return startTime_ == null
              ? com.google.protobuf.Timestamp.getDefaultInstance()
              : startTime_;
        }
      }
<pre>
Start time of the partition.
</pre>

<code>.google.protobuf.Timestamp start_time = 1;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Partition.java