public static Builder newBuilder(
            im.turms.plugin.livekit.core.proto.room.SendDataRequest prototype) {
        return DEFAULT_INSTANCE.toBuilder()
                .mergeFrom(prototype);
    }
<code>optional string topic = 5;</code>

@return The bytes for topic.
turms-plugins/turms-plugin-livekit/src/main/java/im/turms/plugin/livekit/core/proto/room/SendDataRequest.java