Take a look at unittests in [std.container.slist][0]:
```
unittest
{
auto s = SList!int(1, 2, 3, 4, 5);
auto r = s[];
popFrontN(r, 3);
auto r1 = s.linearRemove(r);
assert(s == SList!int(1, 2, 3));
assert(r1.empty);
}
unittest
{
auto s = SList!int(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
auto r = s[];
popFrontN(r, 3);
auto r1 = take(r, 4);
assert(equal(r1, [4, 5, 6, 7]));
auto r2 = s.linearRemove(r1);
assert(s == SList!int(1, 2, 3, 8, 9, 10));
assert(equal(r2, [8, 9, 10]));
}
```
[0]:
https://github.com/D-Programming-Language/phobos/blob/master/std/container/slist.d#L575
