system fallback for span name

Author: zeitlinger

instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/semconv/rpc/RpcSpanNameExtractor.java

@@ -16,13 +16,13 @@ public final class RpcSpanNameExtractor<REQUEST> implements SpanNameExtractor<RE
    * conventions: {@code <rpc.service>/<rpc.method>}.
    */
   public static <REQUEST> SpanNameExtractor<REQUEST> create(
-      RpcAttributesGetter<REQUEST, Object> attributesExtractor) {
+      RpcAttributesGetter<REQUEST, ?> attributesExtractor) {
     return new RpcSpanNameExtractor<>(attributesExtractor);
   }
 
-  private final RpcAttributesGetter<REQUEST, Object> getter;
+  private final RpcAttributesGetter<REQUEST, ?> getter;
 
-  private RpcSpanNameExtractor(RpcAttributesGetter<REQUEST, Object> getter) {
+  private RpcSpanNameExtractor(RpcAttributesGetter<REQUEST, ?> getter) {
     this.getter = getter;
   }
 

instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/internal/SemconvStability.java

@@ -189,13 +189,13 @@ public static AttributeKey<String> getOldRpcMethodAttributeKey() {
     return RPC_METHOD;
   }
 
-  private SemconvStability() {}
-
   public static Attributes getOldRpcMetricAttributes(Attributes attributes) {
     if (emitStableRpcSemconv()) {
       // need to copy attributes
       return attributes.toBuilder().put(RPC_METHOD, attributes.get(RPC_METHOD_OLD)).build();
     }
     return attributes;
   }
+
+  private SemconvStability() {}
 }