g_return_if_fail (folder && TNY_IS_FOLDER (folder));
g_return_if_fail (modest_tny_folder_guess_folder_type (folder)
!= TNY_FOLDER_TYPE_INVALID);
g_return_if_fail (folder && TNY_IS_FOLDER (folder));
g_return_if_fail (modest_tny_folder_guess_folder_type (folder)
!= TNY_FOLDER_TYPE_INVALID);