Merge branch 'main' into multiple-filter-subjects

src/main/java/io/nats/client/Message.java

@@ -28,6 +28,12 @@
  *
  * <p>The byte[] returned by {@link #getData() getData()} is not shared with any library code
  * and is safe to manipulate.
+ *
+ * NOTICE: This interface is intended only to be implemented internally,
+ * although since it is public it is technically available to anyone and
+ * breaking changes should be avoided. For instance:
+ * - Signatures should not be changed.
+ * - If methods are added, a default implementation should be provided.
  */
 public interface Message {
 
@@ -156,5 +162,5 @@ public interface Message {
 	 * Only applies to JetStream messages received from the server.
 	 * @return the consumption byte count or -1 if the message implementation does not support this method
 	 */
-	long consumeByteCount();
+	default long consumeByteCount() { return -1; }
 }