diff --git a/core/lib/Drupal/Core/Config/ConfigFactory.php b/core/lib/Drupal/Core/Config/ConfigFactory.php
index 6ec8a5c..d1240fe 100644
--- a/core/lib/Drupal/Core/Config/ConfigFactory.php
+++ b/core/lib/Drupal/Core/Config/ConfigFactory.php
@@ -11,6 +11,7 @@
 use Drupal\Core\Cache\Cache;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\Yaml\Yaml;
 
 /**
  * Defines the configuration object factory.
@@ -383,6 +384,18 @@ public function addOverride(ConfigFactoryOverrideInterface $config_factory_overr
   }
 
   /**
+   * {@inheritdoc}
+   */
+  public function importNewConfig($name, $path, $trusted_data = FALSE) {
+    $config = $this->getEditable($name);
+    if (!$config->isNew()) {
+      throw new ConfigExistsException('The config ' . $name . ' already exists and can not be re-imported.');
+    }
+    $data = Yaml::parse($path);
+    $config->setData($data)->save($trusted_data);
+  }
+
+  /**
    * Creates a configuration object.
    *
    * @param string $name
diff --git a/core/lib/Drupal/Core/Config/ConfigFactoryInterface.php b/core/lib/Drupal/Core/Config/ConfigFactoryInterface.php
index 69455a8..b8608a0 100644
--- a/core/lib/Drupal/Core/Config/ConfigFactoryInterface.php
+++ b/core/lib/Drupal/Core/Config/ConfigFactoryInterface.php
@@ -122,4 +122,20 @@ public function listAll($prefix = '');
    */
   public function addOverride(ConfigFactoryOverrideInterface $config_factory_override);
 
+  /**
+   * Import new configuration from a given path.
+   *
+   * @param string $name
+   *   The config name to import.
+   * @param string $path
+   *   Path to the configuration to import or YAML string.
+   * @param bool $trusted_data
+   *   Set to TRUE if the configuration data has already been checked to ensure
+   *   it conforms to schema. Generally this is only used during module and
+   *   theme installation.
+   *
+   * @throws \Drupal\Core\Config\ConfigExistsException
+   */
+  public function importNewConfig($name, $path);
+
 }