Function fig_embed_insert_named_key 

pub unsafe extern "C" fn fig_embed_insert_named_key(
    embed: *mut FigEmbed,
    path: *const FigPathSegment,
    path_len: usize,
    name: *const u8,
    name_len: usize,
    val: *const u8,
    val_len: usize,
) -> FigStatus