public Builder setWritesDoneGracePeriod(com.google.protobuf.Duration value) {
        if (writesDoneGracePeriodBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          writesDoneGracePeriod_ = value;
        } else {
          writesDoneGracePeriodBuilder_.setMessage(value);
        }
        bitField0_ |= 0x00000020;
        onChanged();
        return this;
      }
<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>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ReceivePacketsRequest.java