=List.collect=
f(1)
f(2)
List(1)

=List.collectFirst=
f(1)
Some(1)

=Option.collect=
f(1)
Some(1)

=Option.collect=
f(2)
None

=Stream.collect=
f(1)
f(2)
List(1)

=Stream.collectFirst=
f(1)
Some(1)

=ParVector.collect=
(ParVector(1),2)

=ParArray.collect=
(ParArray(1),2)