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diff --git a/External/swiftmailer/lib/classes/Swift/OutputByteStream.php b/External/swiftmailer/lib/classes/Swift/OutputByteStream.php
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+<?php
+
+/*
+ * This file is part of SwiftMailer.
+ * (c) 2004-2009 Chris Corbyn
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * An abstract means of reading data.
+ * Classes implementing this interface may use a subsystem which requires less
+ * memory than working with large strings of data.
+ * @package Swift
+ * @subpackage ByteStream
+ * @author Chris Corbyn
+ */
+interface Swift_OutputByteStream
+{
+  
+  /**
+   * Reads $length bytes from the stream into a string and moves the pointer
+   * through the stream by $length. If less bytes exist than are requested the
+   * remaining bytes are given instead. If no bytes are remaining at all, boolean
+   * false is returned.
+   * @param int $length
+   * @return string
+   * @throws Swift_IoException
+   */
+  public function read($length);
+  
+  /**
+   * Move the internal read pointer to $byteOffset in the stream.
+   * @param int $byteOffset
+   * @return boolean
+   * @throws Swift_IoException
+   */
+  public function setReadPointer($byteOffset);
+  
+}