jaeger-client -> opentelemetry

vendor/open-telemetry/api/Metrics/Noop/NoopObservableUpDownCounter.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\API\Metrics\Noop;
+
+use OpenTelemetry\API\Metrics\ObservableCallbackInterface;
+use OpenTelemetry\API\Metrics\ObservableUpDownCounterInterface;
+
+/**
+ * @internal
+ */
+final class NoopObservableUpDownCounter implements ObservableUpDownCounterInterface
+{
+    public function observe(callable $callback, bool $weaken = false): ObservableCallbackInterface
+    {
+        return new NoopObservableCallback();
+    }
+}