(rangeBounds: StringAdd).self
(rangeBounds: StringFormat).self
(rangeBounds: ArrowAssoc[RangeBounds[R, T]]).x
(Since version 2.10.0) Use leftOfArrow instead
(rangeBounds: Ensuring[RangeBounds[R, T]]).x
(Since version 2.10.0) Use resultOfEnsuring instead
Extracts rangeBounds of a range R. This is to allow working with any representation of rangesContaining. The range must not wrap, that is
end>=start.