private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.Packet,
            com.google.cloud.visionai.v1.Packet.Builder,
            com.google.cloud.visionai.v1.PacketOrBuilder>
        getPacketFieldBuilder() {
      if (packetBuilder_ == null) {
        if (!(requestCase_ == 1)) {
          request_ = com.google.cloud.visionai.v1.Packet.getDefaultInstance();
        }
        packetBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.Packet,
                com.google.cloud.visionai.v1.Packet.Builder,
                com.google.cloud.visionai.v1.PacketOrBuilder>(
                (com.google.cloud.visionai.v1.Packet) request_, getParentForChildren(), isClean());
        request_ = null;
      }
      requestCase_ = 1;
      onChanged();
      return packetBuilder_;
    }
<pre>
Packets sent over the streaming rpc.
</pre>

<code>.google.cloud.visionai.v1.Packet packet = 1;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/SendPacketsRequest.java