SelectionState () { boolean isRequiredSelectionEnabled = computeRequiredSelectionStatus(); String stateMessage = ""; final Object root = myTree.getModel().getRoot(); if (root instanceof CheckedTreeNode) { final int[] selectedModulesCount = {0}; TreeUtil.traverse((CheckedTreeNode)root, node -> { if (node instanceof DataNodeCheckedTreeNode && ((DataNodeCheckedTreeNode)node).isChecked() && myDependencyAwareDataKeys.contains((((DataNodeCheckedTreeNode)node).myDataNode.getKey()))) { selectedModulesCount[0]++; } return true; }); stateMessage = ExternalSystemBundle.message("label.modules.selected", myModulesCount, selectedModulesCount[0]); } return new SelectionState(isRequiredSelectionEnabled, stateMessage); }