public function merge(self $otherMetadata): self
    {
        return new self(array_merge($this->values, $otherMetadata->values));
    }
public function merge(self $otherMetadata): self
    {
        return new self(array_merge($this->values, $otherMetadata->values));
    }
public function merge ( self $ otherMetadata ) : self { return new self ( array_merge ( $ this -> values , $ otherMetadata -> values ) ) ; }
Merges the values of this and the other instance.
Merges the values of this and the other instance .