43     protected $metadata = [];  variable in Facebook\\Authentication\\AccessTokenMetadata
53      * @param array $metadata
57     public function __construct(array $metadata)  argument
59         if (!isset($metadata['data'])) {
63         $this->metadata = $metadata['data'];
78         if (isset($this->metadata[$field])) {
79             return $this->metadata[$field];
112         if (!isset($this->metadata[$parentField])) {
116         if (!isset($this->metadata[$parentField][$field])) {
120         return $this->metadata[$parentField][$field];
385             if (isset($this->metadata[$key]) && $this->metadata[$key] !== 0) {
386                 $this->metadata[$key] = $this->convertTimestampToDateTime($this->metadata[$key]);