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diff --git a/assets/php/vendor/react/stream/src/DuplexStreamInterface.php b/assets/php/vendor/react/stream/src/DuplexStreamInterface.php
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+++ b/assets/php/vendor/react/stream/src/DuplexStreamInterface.php
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+<?php
+
+namespace React\Stream;
+
+/**
+ * The `DuplexStreamInterface` is responsible for providing an interface for
+ * duplex streams (both readable and writable).
+ *
+ * It builds on top of the existing interfaces for readable and writable streams
+ * and follows the exact same method and event semantics.
+ * If you're new to this concept, you should look into the
+ * `ReadableStreamInterface` and `WritableStreamInterface` first.
+ *
+ * Besides defining a few methods, this interface also implements the
+ * `EventEmitterInterface` which allows you to react to the same events defined
+ * on the `ReadbleStreamInterface` and `WritableStreamInterface`.
+ *
+ * The event callback functions MUST be a valid `callable` that obeys strict
+ * parameter definitions and MUST accept event parameters exactly as documented.
+ * The event callback functions MUST NOT throw an `Exception`.
+ * The return value of the event callback functions will be ignored and has no
+ * effect, so for performance reasons you're recommended to not return any
+ * excessive data structures.
+ *
+ * Every implementation of this interface MUST follow these event semantics in
+ * order to be considered a well-behaving stream.
+ *
+ * > Note that higher-level implementations of this interface may choose to
+ *   define additional events with dedicated semantics not defined as part of
+ *   this low-level stream specification. Conformance with these event semantics
+ *   is out of scope for this interface, so you may also have to refer to the
+ *   documentation of such a higher-level implementation.
+ *
+ * @see ReadableStreamInterface
+ * @see WritableStreamInterface
+ */
+interface DuplexStreamInterface extends ReadableStreamInterface, WritableStreamInterface
+{
+}