Using deferred promise in middle of chain..

[scottandrew]

How can you use a deferred promise int he middle of a chain? The only way I can see doing it right now is.

task {
setup1()
} then {
setup2()
} then {
deffered()
} then { promise ->
val result = promise ?: throw(error)
if result.isError() {
throw(error)
} else {
it.get()
}
} fail {
}

Unwrap doesn't seem to exist like is suggested.