MutableSet::firstValue
Returns the first value in the current MutableSet
public function firstValue(): ?Tv;
Returns
?Tv- The first value in the currentMutableSet, ornullif theMutableSetis empty.
Returns the first value in the current MutableSet
public function firstValue(): ?Tv;
?Tv - The first value in the current MutableSet, or null if the
MutableSet is empty.