Fix protobuf schema of java function  error
@@ -151,7 +151,7 @@ public class TopicSchema {
return (Schema<T>)Schema.KV_BYTES();
case PROTOBUF:
- return ProtobufSchema.ofGenericClass(clazz, Collections.emptyMap());
+ return ProtobufSchema.ofGenericClass(clazz, new HashMap<>());
default:
throw new RuntimeException("Unsupported schema type" + type);
