Function erlang_nif_sys::erlang_nif_sys_api::enif_map_iterator_create

pub unsafe extern "C" fn enif_map_iterator_create(
    env: *mut ErlNifEnv, 
    map: ERL_NIF_TERM, 
    iter: *mut ErlNifMapIterator, 
    entry: ErlNifMapIteratorEntry
) -> c_int

See enif_map_iterator_create in the Erlang docs.