(canBuildFrom: StringAdd).self
(canBuildFrom: StringFormat).self
(canBuildFrom: ArrowAssoc[CanBuildFrom[Elem, To]]).x
(Since version 2.10.0) Use leftOfArrow instead
(canBuildFrom: Ensuring[CanBuildFrom[Elem, To]]).x
(Since version 2.10.0) Use resultOfEnsuring instead
Serves the same purpose as standard Scala
CanBuildFrom, however this one isSerializable.