g_return_val_if_fail(method==&GnomeVFSMethod_static,GNOME_VFS_ERROR_BAD_PARAMETERS);
g_return_val_if_fail(method_handle_return!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);
g_return_val_if_fail(method==&GnomeVFSMethod_static,GNOME_VFS_ERROR_BAD_PARAMETERS);
g_return_val_if_fail(method_handle_return!=NULL,GNOME_VFS_ERROR_BAD_PARAMETERS);