Function tsk_treeseq_pi2 

pub unsafe extern "C" fn tsk_treeseq_pi2(
    self_: *const tsk_treeseq_t,
    num_sample_sets: tsk_size_t,
    sample_set_sizes: *const tsk_size_t,
    sample_sets: *const tsk_id_t,
    num_rows: tsk_size_t,
    row_sites: *const tsk_id_t,
    row_positions: *const f64,
    num_cols: tsk_size_t,
    col_sites: *const tsk_id_t,
    col_positions: *const f64,
    options: tsk_flags_t,
    result: *mut f64,
) -> c_int

Available on crate feature bindings only.