Returns a new set which is the intersect of s1 and s2.

Returns a new Set pre-populated with the given items.

Returns a new Set pre-populated with the given items.

Returns a new set which is the difference between s1 and s2.

Returns a new set which is the union of s1 and s2.

An unordered collection of unique elements which supports lookups, insertions, deletions, iteration, and common binary set operations.