Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/console/Formatter/OutputFormatterStyleInterface.php

@@ -0,0 +1,72 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Console\Formatter;
+
+/**
+ * Formatter style interface for defining styles.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * @api
+ */
+interface OutputFormatterStyleInterface
+{
+    /**
+     * Sets style foreground color.
+     *
+     * @param string $color The color name
+     *
+     * @api
+     */
+    public function setForeground($color = null);
+
+    /**
+     * Sets style background color.
+     *
+     * @param string $color The color name
+     *
+     * @api
+     */
+    public function setBackground($color = null);
+
+    /**
+     * Sets some specific style option.
+     *
+     * @param string $option The option name
+     *
+     * @api
+     */
+    public function setOption($option);
+
+    /**
+     * Unsets some specific style option.
+     *
+     * @param string $option The option name
+     */
+    public function unsetOption($option);
+
+    /**
+     * Sets multiple style options at once.
+     *
+     * @param array $options
+     */
+    public function setOptions(array $options);
+
+    /**
+     * Applies the style to a given text.
+     *
+     * @param string $text The text to style
+     *
+     * @return string
+     */
+    public function apply($text);
+}