Added missing session base class

lib/mwlib/src/MW/Session/Base.php

@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * @license LGPLv3, http://opensource.org/licenses/LGPL-3.0
+ * @copyright Aimeos (aimeos.org), 2019
+ * @package MW
+ * @subpackage Session
+ */
+
+
+namespace Aimeos\MW\Session;
+
+
+/**
+ * Base class for session adapters
+ *
+ * @package MW
+ * @subpackage Session
+ */
+abstract class Base
+{
+	/**
+	 * Sets a list of key/value pairs.
+	 *
+	 * @param array $values Associative list of key/value pairs
+	 * @return \Aimeos\MW\Session\Iface Session instance for method chaining
+	 */
+	public function apply( array $values )
+	{
+		foreach( $values as $key => $value ) {
+			$this->set( $key, $value );
+		}
+
+		return $this;
+	}
+}