Function markFunction

2.0.3/2.0.3.js:1186–1189

* Mark a function for special use by Sizzle * @param {Function} fn The function to mark

( fn )

         * @param {Function} fn The function to mark
         */
        function markFunction( fn ) {
            fn[ expando ] = true;
            return fn;
        }

        /**
         * Support testing using an element