func (mm *ImmutableStringAppleMap) ContainsKey(k string) bool {
	if mm == nil {
		return false
	}

	_, found := mm.m[k]
	return found
}
// ContainsKey determines if a given item is already in the map.
ContainsKey determines if a given item is already in the map.
// ContainsKey determines if a given item is already in the map .
func (mm *ImmutableStringAppleMap) ContainsKey(k string) bool {
	if mm == nil {
		return false
	}
	_, found := mm.m[k]
	return found
}
func ( mm * ImmutableStringAppleMap ) ContainsKey ( k string ) bool { if mm == nil { return false } _ , found := mm . m [ k ] return found }
ContainsKey determines if a given item is already in the map.
ContainsKey determines if a given item is already in the map .