Creates a new hash set and fills it with the elements of a given array.
Returns a type-specific list iterator on the elements in this set, starting from
a given element of
Adds a key to the set; if the key is already present, it is moved to the first
position of the itera
Returns the first element of this set in iteration order.
Modifies the #link vector for a shift from s to d. This method will complete in