public com.google.protobuf.Timestamp.Builder getStartTimeBuilder() {
          bitField0_ |= 0x00000001;
          onChanged();
          return getStartTimeFieldBuilder().getBuilder();
        }
<pre>
The start time of the accumulated count.
</pre>

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