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diff --git a/vendor/react/promise/src/PromiseInterface.php b/vendor/react/promise/src/PromiseInterface.php
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+++ b/vendor/react/promise/src/PromiseInterface.php
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+<?php
+
+namespace React\Promise;
+
+interface PromiseInterface
+{
+    /**
+     * Transforms a promise's value by applying a function to the promise's fulfillment
+     * or rejection value. Returns a new promise for the transformed result.
+     *
+     * The `then()` method registers new fulfilled and rejection handlers with a promise
+     * (all parameters are optional):
+     *
+     *  * `$onFulfilled` will be invoked once the promise is fulfilled and passed
+     *     the result as the first argument.
+     *  * `$onRejected` will be invoked once the promise is rejected and passed the
+     *     reason as the first argument.
+     *  * `$onProgress` (deprecated) will be invoked whenever the producer of the promise
+     *     triggers progress notifications and passed a single argument (whatever it
+     *     wants) to indicate progress.
+     *
+     * It returns a new promise that will fulfill with the return value of either
+     * `$onFulfilled` or `$onRejected`, whichever is called, or will reject with
+     * the thrown exception if either throws.
+     *
+     * A promise makes the following guarantees about handlers registered in
+     * the same call to `then()`:
+     *
+     *  1. Only one of `$onFulfilled` or `$onRejected` will be called,
+     *      never both.
+     *  2. `$onFulfilled` and `$onRejected` will never be called more
+     *      than once.
+     *  3. `$onProgress` (deprecated) may be called multiple times.
+     *
+     * @param callable|null $onFulfilled
+     * @param callable|null $onRejected
+     * @param callable|null $onProgress This argument is deprecated and should not be used anymore.
+     * @return PromiseInterface
+     */
+    public function then(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null);
+}