Add complete downstream API gate

crates/libremetaverse/src/generated.rs

@@ -17437,7 +17437,6 @@ pub struct Logger;
 impl Logger {
     /// C# member: `E:LibreMetaverse.Logger.OnLogMessage`.
     pub fn subscribe_on_log_message(
-        &self,
         handler: Option<libremetaverse::LoggerLogCallback>,
     ) -> libremetaverse_types::compat::Subscription {
         libremetaverse_types::unimplemented_api!("E:LibreMetaverse.Logger.OnLogMessage")