Can't find Auto Trim (Strip Silence)?

I know this exists because I used it on a much earlier version of Reaper, but... Where is the Auto Trim/Strip Silence command? I thought I could right-click on selected items and choose Item Processing -> Auto Trim/Split selected items, but I no longer see the command there. I'm using Reaper 2.55, FWIW.

It's still there, search for "trim/split" in the actions list.

Thank you! Problem solved. :)