--- /dev/null
+<?php
+
+namespace Drupal\block_content;
+
+use Drupal\Core\Config\Entity\ConfigEntityInterface;
+use Drupal\Core\Entity\RevisionableEntityBundleInterface;
+
+/**
+ * Provides an interface defining a custom block type entity.
+ */
+interface BlockContentTypeInterface extends ConfigEntityInterface, RevisionableEntityBundleInterface {
+
+ /**
+ * Returns the description of the block type.
+ *
+ * @return string
+ * The description of the type of this block.
+ */
+ public function getDescription();
+
+}