scrollThrottle not implemented?

Looking at the options here https://browsersync.io/docs/options#option-scrollThrottle but adding `scrollThrottle` didn't seem to do anything. I have a search through the server code and could only see its default value being set, but there's no mention if it in the client js at all.

Is this something that's been deprecated from an older version, or has it not yet been implemented?