16     private $state = self::PENDING;  variable in GuzzleHttp\\Promise\\Promise
39         if ($this->state === self::PENDING) {
49         if ($this->state === self::FULFILLED) {
75             if ($this->state === self::FULFILLED) {
85         return $this->state;
90         if ($this->state !== self::PENDING) {
108         if ($this->state === self::PENDING) {
123     private function settle(string $state, $value): void  argument
125         if ($this->state !== self::PENDING) {
127             if ($state === $this->state && $value === $this->result) {
130             throw $this->state === $state
131                 ? new \LogicException("The promise is already {$state}.")
132                 : new \LogicException("Cannot change a {$this->state} promise to {$state}");
140         $this->state = $state;
154             $id = $state === self::FULFILLED ? 1 : 2;
224         if ($this->state !== self::PENDING) {
241         if ($this->state === self::PENDING) {
253             if ($this->state === self::PENDING) {