@java.lang.Override
  public boolean hasStartTime() {
    return ((bitField0_ & 0x00000001) != 0);
  }
<pre>
The start time of the operation.
</pre>

<code>.google.protobuf.Timestamp start_time = 1;</code>

@return Whether the startTime field is set.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/UploadAssetMetadata.java