diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/class-wp-dependency.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/class-wp-dependency.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,97 @@
+<?php
+/**
+ * Dependencies API: _WP_Dependency class
+ *
+ * @since 4.7.0
+ *
+ * @package WordPress
+ * @subpackage Dependencies
+ */
+
+/**
+ * Class _WP_Dependency
+ *
+ * Helper class to register a handle and associated data.
+ *
+ * @access private
+ * @since 2.6.0
+ */
+class _WP_Dependency {
+	/**
+	 * The handle name.
+	 *
+	 * @since 2.6.0
+	 * @var null
+	 */
+	public $handle;
+
+	/**
+	 * The handle source.
+	 *
+	 * @since 2.6.0
+	 * @var null
+	 */
+	public $src;
+
+	/**
+	 * An array of handle dependencies.
+	 *
+	 * @since 2.6.0
+	 * @var array
+	 */
+	public $deps = array();
+
+	/**
+	 * The handle version.
+	 *
+	 * Used for cache-busting.
+	 *
+	 * @since 2.6.0
+	 * @var bool|string
+	 */
+	public $ver = false;
+
+	/**
+	 * Additional arguments for the handle.
+	 *
+	 * @since 2.6.0
+	 * @var null
+	 */
+	public $args = null;  // Custom property, such as $in_footer or $media.
+
+	/**
+	 * Extra data to supply to the handle.
+	 *
+	 * @since 2.6.0
+	 * @var array
+	 */
+	public $extra = array();
+
+	/**
+	 * Setup dependencies.
+	 *
+	 * @since 2.6.0
+	 */
+	public function __construct() {
+		@list( $this->handle, $this->src, $this->deps, $this->ver, $this->args ) = func_get_args();
+		if ( ! is_array($this->deps) )
+			$this->deps = array();
+	}
+
+	/**
+	 * Add handle data.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param string $name The data key to add.
+	 * @param mixed  $data The data value to add.
+	 * @return bool False if not scalar, true otherwise.
+	 */
+	public function add_data( $name, $data ) {
+		if ( !is_scalar($name) )
+			return false;
+		$this->extra[$name] = $data;
+		return true;
+	}
+
+}