1 files changed, 18 insertions, 0 deletions
diff --git a/vendor/open-telemetry/sdk/Common/Future/CancellationInterface.php b/vendor/open-telemetry/sdk/Common/Future/CancellationInterface.php
new file mode 100644
index 000000000..16909ec6d
--- /dev/null
+++ b/vendor/open-telemetry/sdk/Common/Future/CancellationInterface.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Common\Future;
+
+use Closure;
+use Throwable;
+
+interface CancellationInterface
+{
+    /**
+     * @param Closure(Throwable): void $callback
+     */
+    public function subscribe(Closure $callback): string;
+
+    public function unsubscribe(string $id): void;
+}