Iterate/sort associative array by value?

[kdevel]

On Sunday, 7 April 2019 at 17:16:12 UTC, Seb wrote:
> ---
> ["a": 1].byPair.array.sort!((a, b) => a.value < 
> a.value).release.each!writeln;
> ---

What's the purpose of .release? The documentation in 
https://dlang.org/phobos/std_range.html#.SortedRange.release is 
rather monosyllabic.