function hintsArePending(deferredHints) {
        return (deferredHints && !deferredHints.hasOwnProperty("hints") &&
            deferredHints.state() === "pending");
    }
Check if a hint response is pending.

@param {jQuery.Deferred} deferredHints - deferred hint response
@return {boolean} - true if deferred hints are pending, false otherwise.