Merge pull request nextcloud#43513 from nextcloud/backport/40067/stab…

…le27

[stable27] fix: make cancelOperation public

core/Command/Base.php

@@ -161,7 +161,7 @@ protected function abortIfInterrupted() {
 	 *
 	 * Gives a chance to the command to properly terminate what it's doing
 	 */
-	protected function cancelOperation() {
+	public function cancelOperation(): void {
 		$this->interrupted = true;
 	}