necessary, and one can always assignment-convert mutable fields, wrapping them in mutable structs as needed.
Девушка элегантно отомстила соседке за съеденный без спроса торт02:31，推荐阅读新收录的资料获取更多信息
，推荐阅读新收录的资料获取更多信息
When to reach for this
println(factorial(10)); // 3628800。新收录的资料对此有专业解读