std::cout << "Items : " << node_header.item_count << std::endl;
std::cout << "Free : " << node_header.free_space << " (" << (header.block_size - sizeof (BTreeNodeHeader)) << ")" << std::endl;
while (it != node_keys.end ()) {
std::cout << "Items : " << node_header.item_count << std::endl;
std::cout << "Free : " << node_header.free_space << " (" << (header.block_size - sizeof (BTreeNodeHeader)) << ")" << std::endl;
while (it != node_keys.end ()) {