func (set *Set) Add(arr ...interface{}) {
	for _, v := range arr {
		set.List[v] = struct{}{}
	}
}
// Add inserts new value/s into set
Add inserts new value/s into set
// Add inserts new value / s into set
func (set *Set) Add(arr ...interface{}) {
	for _, v := range arr {
		set.List[v] = struct{}{}
	}
}
func ( set * Set ) Add ( arr ... interface { } ) { for _ , v := range arr { set . List [ v ] = struct { } { } } }
Add inserts new value/s into set
Add inserts new value / s into set