Add license header

marcelbirkner · marcelbirkner · commit 9091f55b53f4 · 2023-09-15T13:45:42.000+02:00
diff --git a/cmd/telemetrygen/internal/metrics/metrics_types.go b/cmd/telemetrygen/internal/metrics/metrics_types.go
@@ -1,3 +1,6 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
 package metrics
 
 import (
