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diff --git a/vendor/zendframework/zend-feed/src/Writer/Extension/GooglePlayPodcast/Renderer/Feed.php b/vendor/zendframework/zend-feed/src/Writer/Extension/GooglePlayPodcast/Renderer/Feed.php
new file mode 100644
index 000000000..167d9fbef
--- /dev/null
+++ b/vendor/zendframework/zend-feed/src/Writer/Extension/GooglePlayPodcast/Renderer/Feed.php
@@ -0,0 +1,202 @@
+<?php
+/**
+ * @see       https://github.com/zendframework/zend-feed for the canonical source repository
+ * @copyright Copyright (c) 2018 Zend Technologies USA Inc. (https://www.zend.com)
+ * @license   https://github.com/zendframework/zend-feed/blob/master/LICENSE.md New BSD License
+ */
+
+namespace Zend\Feed\Writer\Extension\GooglePlayPodcast\Renderer;
+
+use DOMDocument;
+use DOMElement;
+use Zend\Feed\Writer\Extension;
+
+class Feed extends Extension\AbstractRenderer
+{
+    /**
+     * Set to TRUE if a rendering method actually renders something. This
+     * is used to prevent premature appending of a XML namespace declaration
+     * until an element which requires it is actually appended.
+     *
+     * @var bool
+     */
+    protected $called = false;
+
+    /**
+     * Render feed
+     *
+     * @return void
+     */
+    public function render()
+    {
+        $this->_setAuthors($this->dom, $this->base);
+        $this->_setBlock($this->dom, $this->base);
+        $this->_setCategories($this->dom, $this->base);
+        $this->_setImage($this->dom, $this->base);
+        $this->_setExplicit($this->dom, $this->base);
+        $this->_setDescription($this->dom, $this->base);
+        if ($this->called) {
+            $this->_appendNamespaces();
+        }
+    }
+
+    /**
+     * Append feed namespaces
+     *
+     * @return void
+     */
+    // @codingStandardsIgnoreStart
+    protected function _appendNamespaces()
+    {
+        // @codingStandardsIgnoreEnd
+        $this->getRootElement()->setAttribute(
+            'xmlns:googleplay',
+            'http://www.google.com/schemas/play-podcasts/1.0'
+        );
+    }
+
+    /**
+     * Set feed authors
+     *
+     * @param  DOMDocument $dom
+     * @param  DOMElement $root
+     * @return void
+     */
+    // @codingStandardsIgnoreStart
+    protected function _setAuthors(DOMDocument $dom, DOMElement $root)
+    {
+        // @codingStandardsIgnoreEnd
+        $authors = $this->getDataContainer()->getPlayPodcastAuthors();
+        if (! $authors || empty($authors)) {
+            return;
+        }
+        foreach ($authors as $author) {
+            $el = $dom->createElement('googleplay:author');
+            $text = $dom->createTextNode($author);
+            $el->appendChild($text);
+            $root->appendChild($el);
+        }
+        $this->called = true;
+    }
+
+    /**
+     * Set feed itunes block
+     *
+     * @param  DOMDocument $dom
+     * @param  DOMElement $root
+     * @return void
+     */
+    // @codingStandardsIgnoreStart
+    protected function _setBlock(DOMDocument $dom, DOMElement $root)
+    {
+        // @codingStandardsIgnoreEnd
+        $block = $this->getDataContainer()->getPlayPodcastBlock();
+        if ($block === null) {
+            return;
+        }
+        $el = $dom->createElement('googleplay:block');
+        $text = $dom->createTextNode($block);
+        $el->appendChild($text);
+        $root->appendChild($el);
+        $this->called = true;
+    }
+
+    /**
+     * Set feed categories
+     *
+     * @param  DOMDocument $dom
+     * @param  DOMElement $root
+     * @return void
+     */
+    // @codingStandardsIgnoreStart
+    protected function _setCategories(DOMDocument $dom, DOMElement $root)
+    {
+        // @codingStandardsIgnoreEnd
+        $cats = $this->getDataContainer()->getPlayPodcastCategories();
+        if (! $cats || empty($cats)) {
+            return;
+        }
+        foreach ($cats as $key => $cat) {
+            if (! is_array($cat)) {
+                $el = $dom->createElement('googleplay:category');
+                $el->setAttribute('text', $cat);
+                $root->appendChild($el);
+            } else {
+                $el = $dom->createElement('googleplay:category');
+                $el->setAttribute('text', $key);
+                $root->appendChild($el);
+                foreach ($cat as $subcat) {
+                    $el2 = $dom->createElement('googleplay:category');
+                    $el2->setAttribute('text', $subcat);
+                    $el->appendChild($el2);
+                }
+            }
+        }
+        $this->called = true;
+    }
+
+    /**
+     * Set feed image (icon)
+     *
+     * @param  DOMDocument $dom
+     * @param  DOMElement $root
+     * @return void
+     */
+    // @codingStandardsIgnoreStart
+    protected function _setImage(DOMDocument $dom, DOMElement $root)
+    {
+        // @codingStandardsIgnoreEnd
+        $image = $this->getDataContainer()->getPlayPodcastImage();
+        if (! $image) {
+            return;
+        }
+        $el = $dom->createElement('googleplay:image');
+        $el->setAttribute('href', $image);
+        $root->appendChild($el);
+        $this->called = true;
+    }
+
+    /**
+     * Set explicit flag
+     *
+     * @param  DOMDocument $dom
+     * @param  DOMElement $root
+     * @return void
+     */
+    // @codingStandardsIgnoreStart
+    protected function _setExplicit(DOMDocument $dom, DOMElement $root)
+    {
+        // @codingStandardsIgnoreEnd
+        $explicit = $this->getDataContainer()->getPlayPodcastExplicit();
+        if ($explicit === null) {
+            return;
+        }
+        $el = $dom->createElement('googleplay:explicit');
+        $text = $dom->createTextNode($explicit);
+        $el->appendChild($text);
+        $root->appendChild($el);
+        $this->called = true;
+    }
+
+    /**
+     * Set podcast description
+     *
+     * @param  DOMDocument $dom
+     * @param  DOMElement $root
+     * @return void
+     */
+    // @codingStandardsIgnoreStart
+    protected function _setDescription(DOMDocument $dom, DOMElement $root)
+    {
+        // @codingStandardsIgnoreEnd
+        $description = $this->getDataContainer()->getPlayPodcastDescription();
+        if (! $description) {
+            return;
+        }
+        $el = $dom->createElement('googleplay:description');
+        $text = $dom->createTextNode($description);
+        $el->appendChild($text);
+        $root->appendChild($el);
+        $this->called = true;
+    }
+}