Function twig_editor_insert_directive 

pub unsafe extern "C" fn twig_editor_insert_directive(
    editor: *mut TwigEditor,
    offset: usize,
    name_ptr: *const u8,
    name_len: usize,
    label_ptr: *const u8,
    label_len: usize,
    attrs_ptr: *const TwigKeyVal,
    attrs_len: usize,
    out_change: *mut TwigChange,
) -> TwigStatus