containsDuplicateValues method Null safety
Checks if a map contains duplicate values in its values by using sets
Implementation
bool containsDuplicateValues() {
Set<V> check = Set<V>.from(values);
return check.length == values.length;
}Checks if a map contains duplicate values in its values by using sets
bool containsDuplicateValues() {
Set<V> check = Set<V>.from(values);
return check.length == values.length;
}