Function mdbx_replace_ex

pub unsafe extern "C" fn mdbx_replace_ex(
    txn: *mut MDBX_txn,
    dbi: u32,
    key: *const iovec,
    new_data: *mut iovec,
    old_data: *mut iovec,
    flags: u32,
    preserver: Option<unsafe extern "C" fn(*mut c_void, *mut iovec, *const c_void, usize) -> i32>,
    preserver_context: *mut c_void,
) -> i32

Available on crate feature mdbx only.