title: NotSerializableException on SimpleListProperty
body: <p>I'm using Javafx, and I wrap my objects into ListProperty to let the tableview updates for any changes on the objects of the list. Now I'm trying to serialize my project and the ListProperty of objects and it throw me this exception. </p>
  
  <pre><code>java.io.NotSerializableException: javafx.beans.property.SimpleListProperty
  at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1181)
  at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1541)
  at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1506)
  at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1429)
  at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)
  at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)
  at Util.FileManager.serializeProject(FileManager.java:23)
  at Controller.FrameworkController.saveProject(FrameworkController.java:549)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:606)
  at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:75)
  at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:606)
  at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:279)
  at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1435)
  at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:69)
  at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
  at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
  at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
  at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
  at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
  at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:28)
  at javafx.event.Event.fireEvent(Event.java:171)
  at javafx.scene.control.MenuItem.fire(MenuItem.java:456)
  at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer.doSelect(ContextMenuContent.java:1197)
  at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer$6.handle(ContextMenuContent.java:1148)
  at com.sun.javafx.scene.control.skin.ContextMenuContent$MenuItemContainer$6.handle(ContextMenuContent.java:1146)
  at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:69)
  at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
  at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
  at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
  at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
  at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
  at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
  at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
  at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
  at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
  at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
  at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33)
  at javafx.event.Event.fireEvent(Event.java:171)
  at javafx.scene.Scene$MouseHandler.process(Scene.java:3328)
  at javafx.scene.Scene$MouseHandler.process(Scene.java:3168)
  at javafx.scene.Scene$MouseHandler.access$1900(Scene.java:3123)
  at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1563)
  at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2265)
  at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:250)
  at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:173)
  at java.security.AccessController.doPrivileged(Native Method)
  at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:292)
  at com.sun.glass.ui.View.handleMouseEvent(View.java:528)
  at com.sun.glass.ui.View.notifyMouse(View.java:922)
  at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
  at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
  at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:73)
  at java.lang.Thread.run(Thread.java:724)
  </code></pre>
  
  <p>My project class is something like this and all my own objects are already implementing serializable.</p>
  
  <pre><code>public class Project implements Serializable{
  
  private String name;
  private String standard;
  private ListProperty&lt;Equipment&gt; projectEquipments;
  
  private ListProperty&lt;LegendElement&gt; equipmentsLegend;
  
  public Project() {
      this.projectEquipments = new SimpleListProperty&lt;Equipment&gt;(FXCollections.observableArrayList(new ArrayList&lt;Equipment&gt;()));
  
      this.equipmentsLegend = new SimpleListProperty&lt;&gt;(FXCollections.observableList(new ArrayList&lt;LegendElement&gt;()));}
  </code></pre>
  
  <p>What can I do to serialize my project and the list of equipment within it?</p>