how to decide queue size using rossharp RosBridgeClient?

[hkkim-morai]

• I am at the right place and my issue is directly related to ROS#. General technical questions I would post e.g. at ROS Answers or Stack Overflow. For library-specific questions I would look for help in the corresponding library forums.
• I have thoroughly read the Contributing Guideline and writing this issue is the right thing to do in my case.

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I have a question!

• I searched the Issues 251 for an answer. I tried my best to find the answer by myself without success. I believe that the discussion we will have in this issue, and the solutions we might find, will help me, and likely other community members who have a similar problem.

Here is my question:
Since my unity program(publisher) get blocking when rviz(subcriber) cannot deal with too much data, I'd like to adjust queue size(length) using rossharp.
How to do it? I found it just using IProtocol Send.

• My OS is: Linux
• My Unity Version is: 2020.3.6f1
• My ROS Distribution is: noetic
• My Build Target Platform is: Unity Editor

I found the Subscription has throttle_rate and queue_length and the others option. but not in the Publication.
I attached the image below.