pub unsafe extern "C" fn tsk_treeseq_genealogical_nearest_neighbours(
self_: *const tsk_treeseq_t,
focal: *const tsk_id_t,
num_focal: tsk_size_t,
reference_sets: *const *const tsk_id_t,
reference_set_size: *const tsk_size_t,
num_reference_sets: tsk_size_t,
options: tsk_flags_t,
ret_array: *mut f64
) -> c_int