Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/lib/Drupal/Component/Gettext/PoStreamInterface.php

@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Component\Gettext\PoStreamInterface.
+ */
+
+namespace Drupal\Component\Gettext;
+
+/**
+ * Common functions for file/stream based PO readers/writers.
+ *
+ * @see PoReaderInterface
+ * @see PoWriterInterface
+ */
+interface PoStreamInterface {
+
+  /**
+   * Open the stream. Set the URI for the stream earlier with setURI().
+   */
+  public function open();
+
+  /**
+   * Close the stream.
+   */
+  public function close();
+
+  /**
+   * Gets the URI of the PO stream that is being read or written.
+   *
+   * @return
+   *   URI string for this stream.
+   */
+  public function getURI();
+
+  /**
+   * Set the URI of the PO stream that is going to be read or written.
+   *
+   * @param $uri
+   *   URI string to set for this stream.
+   */
+  public function setURI($uri);
+
+}