Creates a parallel Flow from a collection of Flows.
The collection of Flows
A Flow that executes the given collection in parallel
And
Flow.par(Seq(t1,t2,t3)) = t1 | t2 | t3
Creates a sequence of a collection of Flows.
A Flow that executes the given collection in sequence
Then
Flow.seq(Seq(t1,t2,t3)) = t1 > t2 > t3