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diff --git a/bin/wiki/vendor/addwiki/mediawiki-api-base/src/MultipartRequest.php b/bin/wiki/vendor/addwiki/mediawiki-api-base/src/MultipartRequest.php
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+++ b/bin/wiki/vendor/addwiki/mediawiki-api-base/src/MultipartRequest.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace Mediawiki\Api;
+
+use Exception;
+
+/**
+ * A MultipartRequest is the same as a FluentRequest with additional support for setting request
+ * parameters (both normal parameters and headers) on multipart requests.
+ *
+ * @link http://docs.guzzlephp.org/en/stable/request-options.html#multipart
+ *
+ * @since 2.4.0
+ */
+class MultipartRequest extends FluentRequest {
+
+	/** @var mixed[] */
+	protected $multipartParams = [];
+
+	/**
+	 * Check the structure of a multipart parameter array.
+	 *
+	 * @param mixed[] $params The multipart parameters to check.
+	 *
+	 * @throws Exception
+	 */
+	protected function checkMultipartParams( $params ) {
+		foreach ( $params as $key => $val ) {
+			if ( !is_array( $val ) ) {
+				throw new Exception( "Parameter '$key' must be an array." );
+			}
+			if ( !in_array( $key, array_keys( $this->getParams() ) ) ) {
+				throw new Exception( "Parameter '$key' is not already set on this request." );
+			}
+		}
+	}
+
+	/**
+	 * Set all multipart parameters, replacing all existing ones.
+	 *
+	 * Each key of the array passed in here must be the name of a parameter already set on this
+	 * request object.
+	 *
+	 * @param mixed[] $params The multipart parameters to use.
+	 * @return $this
+	 */
+	public function setMultipartParams( $params ) {
+		$this->checkMultipartParams( $params );
+		$this->multipartParams = $params;
+		return $this;
+	}
+
+	/**
+	 * Add extra multipart parameters.
+	 *
+	 * Each key of the array passed in here must be the name of a parameter already set on this
+	 * request object.
+	 *
+	 * @param mixed[] $params The multipart parameters to add to any already present.
+	 *
+	 * @return $this
+	 */
+	public function addMultipartParams( $params ) {
+		$this->checkMultipartParams( $params );
+		$this->multipartParams = array_merge( $this->multipartParams, $params );
+		return $this;
+	}
+
+	/**
+	 * Get all multipart request parameters.
+	 *
+	 * @return mixed[]
+	 */
+	public function getMultipartParams() {
+		return $this->multipartParams;
+	}
+}