Function lh_document_create_from_string 

pub unsafe extern "C" fn lh_document_create_from_string(
    html: *const c_char,
    vtable: *mut lh_container_vtable_t,
    user_data: *mut c_void,
    master_css: *const c_char,
    user_styles: *const c_char,
) -> *mut lh_document_t