/**
 * Find common elements between two sets.
 *
 * @param a First set.
 * @param b Second set.
 * @return Set of common elements between 'a" and 'b`.
 */
fun commonElements(a: Set<*>, b: Set<*>): Set<*> {

    return a.intersect(b)
}
/**
 * Find common elements between two sets.
 *
 * @param a First set.
 * @param b Second set.
 * @return Set of common elements between 'a" and 'b`.
 */
fun commonElements(a: Set<*>, b: Set<*>): Set<*> {
/**
 * Find common elements between two sets.
 *
 * @param a First set.
 * @param b Second set.
 * @return Set of common elements between 'a" and 'b`.
 */
fun commonElements(a: Set<*>, b: Set<*>): Set<*> {

    return a.intersect(b)
}