public override void NodeGUI()
 {
     GUILayout.Space(5);
     GUILayout.BeginVertical("Box");
     GUILayout.Label(new GUIContent("Data to Test", tooltip_data), NodeEditorGUI.nodeLabelBoldCentered);
     GUILayout.BeginHorizontal();
     exprType = (controlExpressionType)RTEditorGUI.EnumPopup(exprType, GUILayout.Width(75));
     if (exprType == controlExpressionType.Variable)
     {
         variableName = GUILayout.TextField(variableName, GUILayout.Width(200f));
     }
     GUILayout.Space(5);
     GUILayout.EndHorizontal();
     GUILayout.EndVertical();
     GUILayout.BeginVertical();
     if (listGUI == null)
     {
         RKnobListGUI <BranchCase> .ElementGUI eGUI = (elt, rect) =>
         {
             #if UNITY_EDITOR
             float xOffset = 0;
             Rect  UIrect  = new Rect(rect.x, rect.y + 2, 60, RTEditorGUI.lineHeight);
             elt.type    = (BranchCase.CaseType)EditorGUI.EnumPopup(UIrect, GUIContent.none, elt.type);
             xOffset    += (UIrect.width + 2);
             UIrect      = new Rect(rect.x + xOffset, rect.y + 1, 170, RTEditorGUI.lineHeight);
             elt.pattern = GUI.TextField(UIrect, elt.pattern);
             xOffset    += (UIrect.width + 2);
             UIrect      = new Rect(rect.x + xOffset, rect.y + 1, 20, RTEditorGUI.lineHeight);
             xOffset    += (UIrect.width + 2);
             UIrect      = new Rect(rect.x + xOffset, rect.y + 1, 20, RTEditorGUI.lineHeight);
             #endif
         };
         listGUI = new RKnobListGUI <BranchCase>(cases, new GUIContent("Branch Cases"), eGUI,
                                                 (elt) => RTEditorGUI.lineHeight, (item) => new ConnectionKnob[] { item.connection },
                                                 (item, rect) => item.connection.SetPosition(rect.yMin + (NodeEditorGUI.knobSize * 2) - 3),
                                                 () => new BranchCase(this));
     }
     listGUI.DoLayoutList();
     GUILayout.EndVertical();
     GUILayout.BeginVertical("Box");
     GUILayout.Label(new GUIContent("Default Branch", tooltip_branch_default), NodeEditorGUI.nodeLabelBoldCentered);
     toDefaultBranch.SetPosition();
     GUILayout.EndVertical();
 }