sortedBy<R extends Comparable> method
Returns a List of all elements sorted according to natural sort order of
the value returned by specified selector
function.
Implementation
List<E> sortedBy<R extends Comparable>(R Function(E element) selector) =>
associateBy(selector)
.entries
.sortedWith((a, b) => a.key.compareTo(b.key))
.map((element) => element.value)
.toList();