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

core/modules/taxonomy/src/VocabularyInterface.php

@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\taxonomy\VocabularyInterface.
+ */
+
+namespace Drupal\taxonomy;
+
+use Drupal\Core\Config\Entity\ConfigEntityInterface;
+
+/**
+ * Provides an interface defining a taxonomy vocabulary entity.
+ */
+interface VocabularyInterface extends ConfigEntityInterface {
+
+  /**
+   * Returns the vocabulary hierarchy.
+   *
+   * @return integer
+   *   The vocabulary hierarchy.
+   */
+  public function getHierarchy();
+
+  /**
+   * Sets the vocabulary hierarchy.
+   *
+   * @param integer $hierarchy
+   *   The hierarchy type of vocabulary.
+   *   Possible values:
+   *    - TAXONOMY_HIERARCHY_DISABLED: No parents.
+   *    - TAXONOMY_HIERARCHY_SINGLE: Single parent.
+   *    - TAXONOMY_HIERARCHY_MULTIPLE: Multiple parents.
+   *
+   * @return $this
+   */
+  public function setHierarchy($hierarchy);
+
+  /**
+   * Returns the vocabulary description.
+   *
+   * @return string
+   *   The vocabulary description.
+   */
+  public function getDescription();
+}