@function __union($arguments...) {
    @return __base-uniq(__base-flatten($arguments, false, true));
}


/// Creates a list of unique values, in order.
///
///
/// @access public
/// @group List
/// @param {List...} $lists... The lists to inspect.
/// @returns {List} Returns the new list of combined values.
/// @example scss
/// $foo: _union((1, 2), (4, 2), (2, 1));
/// // => (1, 2, 4)

@function _union($args...) {
    @return call(get-function('__union'), $args...);
}