Add isEmpty to EntityDocument

Author: Benestar

src/Entity/Entity.php

@@ -322,17 +322,6 @@ public function getClaims() {
 		return array();
 	}
 
-	/**
-	 * Returns if the Entity has no content.
-	 * Having an id set does not count as having content.
-	 *
-	 * @since 0.1
-	 * @deprecated since 1.0
-	 *
-	 * @return bool
-	 */
-	public abstract function isEmpty();
-
 	/**
 	 * Removes all content from the Entity.
 	 * The id is not part of the content.

src/Entity/EntityDocument.php

@@ -42,4 +42,14 @@ public function getType();
 	 */
 	public function setId( $id );
 
+	/**
+	 * Returns if the entity has no content.
+	 * Having an id set does not count as having content.
+	 *
+	 * @since 4.2
+	 *
+	 * @return bool
+	 */
+	public function isEmpty();
+
 }