recording function on chrome://net-internals/#sockets

[moong23]

idk if i have found the right repository to ask this question.(sry if not 😢)

wanted to track down the tcp sockets of browser using chromium engine,
but seems like there is no "start recording" function enabled at the page below

chrome://net-internals/#sockets

seems like there was "start recording" function according to old snapshots
but can't find this function today.