[Chrome Devtools Protocol]: Get Renderer Process ID through Devtools Protocol - google-chrome

Problem Description
I am trying to get chromium renderer process id of chrome relative to specific tab(page, frame) using Devtools Protocol. I know there has chrome api[1] chrome.processes for doing such things(eg. chrome.processes.getProcessIdForTab). However, I wonder if any equivalent api in Devtools Protocol[2] doing the things too. I can't find explicit solution in Devtools document[2].
Thanks for your help.
Reference
[1] “chrome.processes,” Chrome Developers. [Online]. Available: https://developer.chrome.com/docs/extensions/reference/processes. [Accessed: 14-Jun-2021].
[2] "Chrome DevTools Protocol," Chrome Developers. [Online]. Available: https://chromedevtools.github.io/devtools-protocol/. [Accessed: 14-Jun-2021]

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Disclaimer: I work with the Firebug Working Group
Chrome 12 (12.0.742.6) will have this feature!
You can already download the beta of 12 today.
https://bugs.webkit.org/show_bug.cgi?id=20628#c4