// java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
// at android.view.ViewGroup.addViewInner(ViewGroup.java:4309)
// at android.view.ViewGroup.addView(ViewGroup.java:4145)
// at android.view.ViewGroup.addView(ViewGroup.java:4086)
// at android.view.ViewGroup.addView(ViewGroup.java:4059)
// at android.support.v7.widget.Toolbar.addChildrenForExpandedActionView(Toolbar.java:1797)
// at android.support.v7.widget.Toolbar$ExpandedActionViewMenuPresenter.collapseItemActionView(Toolbar.java:2039)
// at android.support.v7.view.menu.MenuBuilder.collapseItemActionView(MenuBuilder.java:1345)
// at android.support.v7.view.menu.MenuItemImpl.collapseActionView(MenuItemImpl.java:705)
// at android.support.v7.widget.Toolbar.collapseActionView(Toolbar.java:558)
// at android.support.v7.widget.Toolbar$3.onClick(Toolbar.java:1053)
// at android.view.View.performClick(View.java:5204)
// at android.view.View$PerformClick.run(View.java:21153)
// at android.os.Handler.handleCallback(Handler.java:739)
// at android.os.Handler.dispatchMessage(Handler.java:95)
// at android.os.Looper.loop(Looper.java:148)
// at android.app.ActivityThread.main(ActivityThread.java:5417)
// at java.lang.reflect.Method.invoke(Native Method)
// at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
// at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)