diff --git a/Gir_GstEditingServices.toml b/Gir_GstEditingServices.toml
index 9b945a03c..76213ca60 100644
--- a/Gir_GstEditingServices.toml
+++ b/Gir_GstEditingServices.toml
@@ -201,6 +201,10 @@ status = "generate"
         [object.function.return]
         bool_return_is_error = "Failed to unproxy asset"
 
+    [[object.function]]
+    name = "request_async"
+    ignore = true # manual skip_assert_initialized
+
 [[object]]
 name = "GES.Clip"
 status = "generate"
diff --git a/gstreamer-editing-services/src/asset.rs b/gstreamer-editing-services/src/asset.rs
new file mode 100644
index 000000000..c7d54d894
--- /dev/null
+++ b/gstreamer-editing-services/src/asset.rs
@@ -0,0 +1,74 @@
+// Copyright (C) 2020 Guillaume Gomez <guillaume1.gomez@gmail.com>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use gio;
+use glib;
+use glib::prelude::*;
+use glib::translate::*;
+use std::boxed::Box as Box_;
+use std::pin::Pin;
+use std::ptr;
+use Asset;
+
+impl Asset {
+    pub fn request_async<
+        P: IsA<gio::Cancellable>,
+        Q: FnOnce(Result<Asset, glib::Error>) + Send + 'static,
+    >(
+        extractable_type: glib::types::Type,
+        id: &str,
+        cancellable: Option<&P>,
+        callback: Q,
+    ) {
+        assert_initialized_main_thread!();
+        let user_data: Box_<Q> = Box_::new(callback);
+        unsafe extern "C" fn request_async_trampoline<
+            Q: FnOnce(Result<Asset, glib::Error>) + Send + 'static,
+        >(
+            _source_object: *mut gobject_sys::GObject,
+            res: *mut gio_sys::GAsyncResult,
+            user_data: glib_sys::gpointer,
+        ) {
+            let mut error = ptr::null_mut();
+            let ret = ges_sys::ges_asset_request_finish(res, &mut error);
+            let result = if error.is_null() {
+                Ok(from_glib_full(ret))
+            } else {
+                Err(from_glib_full(error))
+            };
+            let callback: Box_<Q> = Box_::from_raw(user_data as *mut _);
+            callback(result);
+        }
+        let callback = request_async_trampoline::<Q>;
+        unsafe {
+            ges_sys::ges_asset_request_async(
+                extractable_type.to_glib(),
+                id.to_glib_none().0,
+                cancellable.map(|p| p.as_ref()).to_glib_none().0,
+                Some(callback),
+                Box_::into_raw(user_data) as *mut _,
+            );
+        }
+    }
+
+    pub fn request_async_future(
+        extractable_type: glib::types::Type,
+        id: &str,
+    ) -> Pin<Box_<dyn std::future::Future<Output = Result<Asset, glib::Error>> + 'static>> {
+        skip_assert_initialized!();
+        let id = String::from(id);
+        Box_::pin(gio::GioFuture::new(&(), move |_obj, send| {
+            let cancellable = gio::Cancellable::new();
+            Self::request_async(extractable_type, &id, Some(&cancellable), move |res| {
+                send.resolve(res);
+            });
+
+            cancellable
+        }))
+    }
+}
diff --git a/gstreamer-editing-services/src/auto/asset.rs b/gstreamer-editing-services/src/auto/asset.rs
index 26f1ab152..012b9aecd 100644
--- a/gstreamer-editing-services/src/auto/asset.rs
+++ b/gstreamer-editing-services/src/auto/asset.rs
@@ -60,61 +60,6 @@ impl Asset {
             }
         }
     }
-
-    pub fn request_async<
-        P: IsA<gio::Cancellable>,
-        Q: FnOnce(Result<Asset, glib::Error>) + Send + 'static,
-    >(
-        extractable_type: glib::types::Type,
-        id: &str,
-        cancellable: Option<&P>,
-        callback: Q,
-    ) {
-        assert_initialized_main_thread!();
-        let user_data: Box_<Q> = Box_::new(callback);
-        unsafe extern "C" fn request_async_trampoline<
-            Q: FnOnce(Result<Asset, glib::Error>) + Send + 'static,
-        >(
-            _source_object: *mut gobject_sys::GObject,
-            res: *mut gio_sys::GAsyncResult,
-            user_data: glib_sys::gpointer,
-        ) {
-            let mut error = ptr::null_mut();
-            let ret = ges_sys::ges_asset_request_finish(res, &mut error);
-            let result = if error.is_null() {
-                Ok(from_glib_full(ret))
-            } else {
-                Err(from_glib_full(error))
-            };
-            let callback: Box_<Q> = Box_::from_raw(user_data as *mut _);
-            callback(result);
-        }
-        let callback = request_async_trampoline::<Q>;
-        unsafe {
-            ges_sys::ges_asset_request_async(
-                extractable_type.to_glib(),
-                id.to_glib_none().0,
-                cancellable.map(|p| p.as_ref()).to_glib_none().0,
-                Some(callback),
-                Box_::into_raw(user_data) as *mut _,
-            );
-        }
-    }
-
-    pub fn request_async_future(
-        extractable_type: glib::types::Type,
-        id: &str,
-    ) -> Pin<Box_<dyn std::future::Future<Output = Result<Asset, glib::Error>> + 'static>> {
-        let id = String::from(id);
-        Box_::pin(gio::GioFuture::new(&(), move |_obj, send| {
-            let cancellable = gio::Cancellable::new();
-            Self::request_async(extractable_type, &id, Some(&cancellable), move |res| {
-                send.resolve(res);
-            });
-
-            cancellable
-        }))
-    }
 }
 
 pub const NONE_ASSET: Option<&Asset> = None;