code checker fixes for instanceOfStorage

Signed-off-by: Robin Appelman <robin@icewind.nl>

apps/files_sharing/lib/ISharedStorage.php

@@ -22,5 +22,7 @@
  */
 namespace OCA\Files_Sharing;
 
-interface ISharedStorage {
+use OCP\Files\Storage\IStorage;
+
+interface ISharedStorage extends IStorage {
 }

lib/public/Files/IHomeStorage.php

@@ -26,10 +26,12 @@
 
 namespace OCP\Files;
 
+use OCP\Files\Storage\IStorage;
+
 /**
  * Interface IHomeStorage
  *
  * @since 7.0.0
  */
-interface IHomeStorage {
+interface IHomeStorage extends IStorage {
 }

lib/public/Files/Storage/IDisableEncryptionStorage.php

@@ -28,5 +28,5 @@ namespace OCP\Files\Storage;
  *
  * @since 16.0.0
  */
-interface IDisableEncryptionStorage {
+interface IDisableEncryptionStorage extends IStorage {
 }

lib/public/Files/Storage/IStorage.php

@@ -356,9 +356,12 @@ interface IStorage {
 	/**
 	 * Check if the storage is an instance of $class or is a wrapper for a storage that is an instance of $class
 	 *
+	 * @template T of IStorage
 	 * @param string $class
+	 * @psalm-param class-string<T> $class
 	 * @return bool
 	 * @since 9.0.0
+	 * @psalm-assert-if-true T $this
 	 */
 	public function instanceOfStorage($class);