@java.lang.Override
    public com.google.protobuf.Duration getWritesDoneGracePeriod() {
      return writesDoneGracePeriod_ == null
          ? com.google.protobuf.Duration.getDefaultInstance()
          : writesDoneGracePeriod_;
    }
<pre>
The grace period after which a `writes_done_request` is issued, that a
`WritesDone` is expected from the client.

The server is free to cancel the RPC should this expire.

A system default will be chosen if unset.
</pre>

<code>.google.protobuf.Duration writes_done_grace_period = 6;</code>

@return The writesDoneGracePeriod.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ReceiveEventsRequest.java