* AccessibleStateSet_compare:
* @obj: a pointer to the first #AccessibleStateSet object on which to operate.
* @obj2: a pointer to the second #AccessibleStateSet object on which to operate.
+ * @differenceSet: a pointer to an array of #AccessibleStates, which is set when the
+ * fuction returns to point to an array of states representing the states which
+ * the two state sets do not have in common.
*
* Determine the differences between two instances of #AccessibleStateSet.
*.