in the swim
(idiomatic) Actively participating in the flow of events; very involved.
I was a redhead and a middle child; both can make you feel excluded. It's like fighting to be included, in the swim of things. After a while you start to develop a bit of a victim mentality, which isn't great for a happy life. Shirley Manson
Before we started that race, I jokingly said to another one of the masters swimmers who was also racing that day that my only goal was to beat John in the swim. Source: Internet
This allows users to map a key and corresponding text to be displayed in the swim lane header. Source: Internet