"Abstract supertype of ranged objects which map a range of `Comparable` keys to ranges of values. The type parameter `Span` abstracts the type of the resulting range. A span may be obtained from an instance of `Ranged` using the span operator: print(\"hello world\"[0..5]) " see (`interface List`, `interface Sequence`, `class String`) shared interface Ranged<in Index, out Span> of Span given Index satisfies Comparable<Index> { "Obtain a span containing the mapped values between the two given indices." shared formal Span span(Index from, Index to); "Obtain a span containing the mapped values between the starting index and the end of the receiver." shared formal Span spanFrom(Index from); "Obtain a span containing the mapped values between the start of the receiver and the end index." shared formal Span spanTo(Index to); "Obtain a segment containing the mapped values starting from the given index, with the given length." shared formal Span segment(Index from, Integer length); }