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1 efrain 1 
<?php
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namespace GuzzleHttp\Promise;
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final class Is
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{
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    /**
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     * Returns true if a promise is pending.
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     *
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     * @return bool
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     */
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    public static function pending(PromiseInterface $promise)
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    {
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        return $promise->getState() === PromiseInterface::PENDING;
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    }
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    /**
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     * Returns true if a promise is fulfilled or rejected.
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     *
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     * @return bool
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     */
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    public static function settled(PromiseInterface $promise)
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    {
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        return $promise->getState() !== PromiseInterface::PENDING;
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    }
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    /**
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     * Returns true if a promise is fulfilled.
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     *
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     * @return bool
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     */
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    public static function fulfilled(PromiseInterface $promise)
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    {
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        return $promise->getState() === PromiseInterface::FULFILLED;
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    }
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    /**
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     * Returns true if a promise is rejected.
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     *
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     * @return bool
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     */
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    public static function rejected(PromiseInterface $promise)
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    {
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        return $promise->getState() === PromiseInterface::REJECTED;
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    }
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}