SetNodeExpanded
void SetNodeExpanded(const TreeTablePath& path,
void SetNodeExpanded(bool expanded);
fFunctionsTable->SetNodeExpanded(path, true, false);
fFunctionsTable->SetNodeExpanded(path, true, true);
fFunctionsTable->SetNodeExpanded(path, true, true);
nodeInfo.SetNodeExpanded(fVariableTable->IsNodeExpanded(path));
fVariableTable->SetNodeExpanded(path,