get_delta_list_byte_size
put_unaligned_le16(get_delta_list_byte_size(delta_list), &buffer[2]);
get_delta_list_byte_size(delta_list));
used_space += get_delta_list_byte_size(&delta_lists[i]);
get_delta_list_byte_size(delta_list));
get_delta_list_byte_size(&delta_lists[i]) + spacing);
used_space += get_delta_list_byte_size(&delta_lists[i]);