Merged in feature/from-pantheon (pull request #16)

code from pantheon

* code from pantheon

wp/wp-content/plugins/woocommerce/lib/packages/League/Container/ContainerAwareInterface.php

@@ -0,0 +1,40 @@
+<?php declare(strict_types=1);
+
+namespace Automattic\WooCommerce\Vendor\League\Container;
+
+use Automattic\WooCommerce\Vendor\Psr\Container\ContainerInterface;
+
+interface ContainerAwareInterface
+{
+    /**
+     * Set a container
+     *
+     * @param ContainerInterface $container
+     *
+     * @return self
+     */
+    public function setContainer(ContainerInterface $container) : ContainerAwareInterface;
+
+    /**
+     * Get the container
+     *
+     * @return ContainerInterface
+     */
+    public function getContainer() : ContainerInterface;
+
+    /**
+     * Set a container. This will be removed in favour of setContainer receiving Container in next major release.
+     *
+     * @param Container $container
+     *
+     * @return self
+     */
+    public function setLeagueContainer(Container $container) : self;
+
+    /**
+     * Get the container. This will be removed in favour of getContainer returning Container in next major release.
+     *
+     * @return Container
+     */
+    public function getLeagueContainer() : Container;
+}