///Returns whether `$list` contains `$value`.
///@ignore Documentation: http://sassylists.com/documentation.html#sl-contain
///@param {List}    $list  - list to check
///@param {*}       $value - value to look for
///@example
///		sl-contain(a b c, a)
///		// true
///@example
///		sl-contain(a b c, z)
///		// false
///@return {Bool}

@function sl-contain($list, $value) {
  @return not not index($list, $value);
}

///@requires sl-contain
///@alias sl-contain
 
@function sl-include($list, $value) {
  @return sl-contain($list, $value);
}