package record_builder

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type ('elements, 'element) t
val first_element : (('head, _) cons, 'head) t
val of_tail : ('tail, 'element) t -> ((_, 'tail) cons, 'element) t
val within : ('inner, 'element) t -> suffix:('outer, 'inner) Suffix_index.t -> ('outer, 'element) t

Transform an index to find an element within a suffix of the list.

O(n) allocation and work.