pub fn ffi_converter_callback_interface_impl(
trait_ident: &Ident,
trait_impl_ident: &Ident,
udl_mode: bool
) -> TokenStream
pub fn ffi_converter_callback_interface_impl(
trait_ident: &Ident,
trait_impl_ident: &Ident,
udl_mode: bool
) -> TokenStream