prox 1/6

prox_1_6.scala

class PipedProcess[Out, Err, PN1Out, 
                   PN1 <: ProcessNode[_, _, _, _, _], 
                   PN2 <: ProcessNode[_, _, _, _, _], 
                   IRS <: RedirectionState, ORS <: RedirectionState, ERS <: RedirectionState]
    (val from: PN1, val createTo: PipeConstruction[PN1Out] => PN2)
    extends ProcessNode[Out, Err, IRS, ORS, ERS] {
        // ...
}