///Returns the tail of `$list`: all items except the first (head).
///@ignore Documentation: http://sassylists.com/documentation.html#sl-tail
///@requires sl-slice
///@param {List} $list - list to retrieve tail from
///@example
///		sl-tail(a b c)
///		//b c 
///@return {List | Null}
 
@function sl-tail($list) {
  @if sl-missing-dependencies(sl-slice) == true { @return null; }

  @return sl-slice($list, 2);
}

///@requires sl-tail
///@alias sl-tail

@function sl-rest($list) {
  @return sl-tail($list);
}