const std = @import("std"); pub fn freeStringList(alloc: std.mem.Allocator, list: *std.ArrayList([]u8)) void {    for (list.items) |item| alloc.free(item);    list.deinit(alloc);} test "freeStringList frees and deinits an owned string list" {    const alloc = std.testing.allocator;    var list: std.ArrayList([]u8) = .empty;    errdefer {        for (list.items) |item| alloc.free(item);        list.deinit(alloc);    }     try list.append(alloc, try alloc.dupe(u8, "alpha"));    try list.append(alloc, try alloc.dupe(u8, "beta"));     freeStringList(alloc, &list);}