Function twig_builder_add_code_block 

pub unsafe extern "C" fn twig_builder_add_code_block(
    builder: *mut TwigBuilder,
    lang: *const u8,
    lang_len: usize,
    has_lang: c_int,
    text: *const u8,
    text_len: usize,
    out_id: *mut u32,
) -> TwigStatus