directLinkTable = new FlexTable();
directLinkPanel = new VerticalPanel();
createDirectLinkButton = new Button(messages.createDirectLink());
createDirectLinkButton.setEnabled(false);
calculationTree = new CalculationTree();
computableCalculation = new ComputableCalculation();
editableCalculation = new EditableCalculation();
pathNodesStringToEditableCalculationItemMap = new HashMap<String, EditableCalculationItem>();
pathNodesStringToComputableCalculationItemMap = new HashMap<String, ComputableCalculationItem>();
pathNodesStringToUsedCalculationMap = new HashMap<String, CalculationDto>();