lib/storage: reduce MetricName.marshalRaw() scope to test-only since it is only used in tests

Signed-off-by: Artem Fetishev <rtm@victoriametrics.com>

lib/storage/metric_name.go

@@ -494,25 +494,6 @@ func MarshalMetricNameRaw(dst []byte, labels []prompb.Label) []byte {
 	return dst
 }
 
-// marshalRaw marshals mn to dst and returns the result.
-//
-// The results may be unmarshaled with MetricName.UnmarshalRaw.
-//
-// This function is for testing purposes. MarshalMetricNameRaw must be used
-// in prod instead.
-func (mn *MetricName) marshalRaw(dst []byte) []byte {
-	dst = marshalBytesFast(dst, nil)
-	dst = marshalBytesFast(dst, mn.MetricGroup)
-
-	mn.sortTags()
-	for i := range mn.Tags {
-		tag := &mn.Tags[i]
-		dst = marshalBytesFast(dst, tag.Key)
-		dst = marshalBytesFast(dst, tag.Value)
-	}
-	return dst
-}
-
 // UnmarshalRaw unmarshals mn encoded with MarshalMetricNameRaw.
 func (mn *MetricName) UnmarshalRaw(src []byte) error {
 	mn.Reset()

lib/storage/metric_name_test.go

@@ -6,6 +6,25 @@ import (
 	"testing"
 )
 
+// marshalRaw marshals mn to dst and returns the result.
+//
+// The results may be unmarshaled with MetricName.UnmarshalRaw.
+//
+// This function is for testing purposes. MarshalMetricNameRaw must be used
+// in prod instead.
+func (mn *MetricName) marshalRaw(dst []byte) []byte {
+	dst = marshalBytesFast(dst, nil)
+	dst = marshalBytesFast(dst, mn.MetricGroup)
+
+	mn.sortTags()
+	for i := range mn.Tags {
+		tag := &mn.Tags[i]
+		dst = marshalBytesFast(dst, tag.Key)
+		dst = marshalBytesFast(dst, tag.Value)
+	}
+	return dst
+}
+
 func TestMetricNameString(t *testing.T) {
 	f := func(mn *MetricName, resultExpected string) {
 		t.Helper()