defpreservePidStamps[A, B](p: Pipe[Pure, A, B]): Pipe[Pure, PidStamped[A], PidStamped[B]]
Combinator that converts a Pipe[Pure, A, B] in to a Pipe[Pure, PidStamped[A], PidStamped[B]] such that
pidstamps are preserved on elements that flow through the process.