* [`test_all_closest_pairs`](https://github.com/carsonfarmer/fastpair/blob/b5fa448024dbfc3338c89fa8c7bfecd8cc596e4b/fastpair/test/test_fastpair.py#L148) mentions a [`closest_pair_divide_conquer()`](https://github.com/carsonfarmer/fastpair/blob/b5fa448024dbfc3338c89fa8c7bfecd8cc596e4b/fastpair/test/test_fastpair.py#L153) method. * noted here for future investigation