Add table view
In hierarchy make second column as child of first column
In hierarchy dnd table view on top of first column.

Exception:
com.oracle.javafx.authoring.model.transactions.Transaction$TransactionFailed: transaction.reparent.element failed: java.lang.IllegalArgumentException: Failed to set javafx.scene.control.TableColumn.graphic to TableView[id=tableView1, styleClass=table-view] (a javafx.scene.control.TableView)
at com.oracle.javafx.authoring.model.transactions.Transaction.register(Transaction.java:188)
at com.oracle.javafx.authoring.model.transactions.Transaction.setProperty(Transaction.java:519)
at com.oracle.javafx.authoring.dictionary.definition.TableColumnComponentDefinition.setNamedChild(TableColumnComponentDefinition.java:105)
at com.oracle.javafx.authoring.panels.layers.dropTarget.GenericItemDropTarget.drop(GenericItemDropTarget.java:180)
at com.oracle.javafx.authoring.panels.layers.dropTarget.GenericItemDropTarget.drop(GenericItemDropTarget.java:96)
at com.oracle.javafx.authoring.panels.layers.HierarchyDropSupport.drop(HierarchyDropSupport.java:124)
at com.oracle.javafx.authoring.panels.layers.HierarchyPanel.drop(HierarchyPanel.java:324)
at com.oracle.javafx.authoring.controls.TreeDragContext.finish(TreeDragContext.java:187)
at com.oracle.javafx.authoring.controls.TreeDragContext.finish(TreeDragContext.java:169)
at com.oracle.javafx.authoring.panels.layers.HierarchyDragSupport.handleMouseRelease(HierarchyDragSupport.java:92)
at com.oracle.javafx.authoring.panels.layers.HierarchyPanel$7.handle(HierarchyPanel.java:167)
at com.oracle.javafx.authoring.panels.layers.HierarchyPanel$7.handle(HierarchyPanel.java:163)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:64)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)