Function mdbx_estimate_range

pub unsafe extern "C" fn mdbx_estimate_range(
    txn: *const MDBX_txn,
    dbi: MDBX_dbi,
    begin_key: *const MDBX_val,
    begin_data: *const MDBX_val,
    end_key: *const MDBX_val,
    end_data: *const MDBX_val,
    distance_items: *mut isize,
) -> c_int