ss4 >> s4;
data_child.set_label (s4);
} else if (dynamic_cast<BTreeLeafData *>(data)) {
data_type.set_label ("BTreeLeafData");
data_child.set_label ("N/C");
ss4 >> s4;
data_child.set_label (s4);
} else if (dynamic_cast<BTreeLeafData *>(data)) {
data_type.set_label ("BTreeLeafData");
data_child.set_label ("N/C");