Move HTML to Markdown library to Composer

vendor/league/html-to-markdown/src/ElementInterface.php

@@ -0,0 +1,80 @@
+<?php
+
+namespace League\HTMLToMarkdown;
+
+interface ElementInterface
+{
+    /**
+     * @return bool
+     */
+    public function isBlock();
+
+    /**
+     * @return bool
+     */
+    public function isText();
+
+    /**
+     * @return bool
+     */
+    public function isWhitespace();
+
+    /**
+     * @return string
+     */
+    public function getTagName();
+
+    /**
+     * @return string
+     */
+    public function getValue();
+
+    /**
+     * @return ElementInterface|null
+     */
+    public function getParent();
+
+    /**
+     * @param string|string[] $tagNames
+     *
+     * @return bool
+     */
+    public function isDescendantOf($tagNames);
+
+    /**
+     * @return bool
+     */
+    public function hasChildren();
+
+    /**
+     * @return ElementInterface[]
+     */
+    public function getChildren();
+
+    /**
+     * @return ElementInterface|null
+     */
+    public function getNext();
+
+    /**
+     * @return int
+     */
+    public function getSiblingPosition();
+
+    /**
+     * @return string
+     */
+    public function getChildrenAsString();
+
+    /**
+     * @param string $markdown
+     */
+    public function setFinalMarkdown($markdown);
+
+    /**
+     * @param string $name
+     *
+     * @return string
+     */
+    public function getAttribute($name);
+}