@charset “UTF-8”;
/// Checks for a valid number. /// /// @argument {number} $value /// /// @require {function} _contains /// /// @return {boolean} /// /// @access private
@function _is-number($value) {
@return _contains("0" "1" "2" "3" "4" "5" "6" "7" "8" "9" 0 1 2 3 4 5 6 7 8 9, $value);
}