Function LinkedList.insertAfter
Insert value v after element.
Returns
Pointer to inserted element.
Note
element must be not null.
Example
LinkedList!int list;
scope(exit) list .free();
auto first = list .append(1);
auto last = list .append(2);
list .insertAfter(first, 3);
assert(list .length == 3);
auto arr = list .toArray();
assert(arr == [1,3,2]);
Delete(arr);