Add abstract method rcube_storage::fetch_headers()

phpstan-baseline.neon

@@ -15,11 +15,6 @@ parameters:
 			count: 18
 			path: installer/test.php
 
-		-
-			message: "#^Call to an undefined method rcube_storage\\:\\:fetch_headers\\(\\)\\.$#"
-			count: 1
-			path: plugins/archive/archive.php
-
 		-
 			message: """
 				#^Call to deprecated method get_uids\\(\\) of class rcmail\\:

program/lib/Roundcube/rcube_storage.php

@@ -352,6 +352,18 @@ abstract public function get_namespace($name = null);
      */
     abstract public function count($folder = null, $mode = 'ALL', $force = false, $status = true);
 
+    /**
+     * Fetches messages headers (by UID)
+     *
+     * @param string $folder Folder name
+     * @param array  $msgs   Message UIDs
+     * @param bool   $sort   Enables result sorting by $msgs
+     * @param bool   $force  Disables cache use
+     *
+     * @return array Messages headers indexed by UID
+     */
+    abstract public function fetch_headers($folder, $msgs, $sort = true, $force = false);
+
     /**
      * Public method for listing message flags
      *