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Attempt to invoke virtual method 'void android.support.v4.app.Fragment.setMenuVisibility(boolean)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.app.Fragment.setMenuVisibility(boolean)' on a null object reference	at android.support.v4.app.FragmentStatePagerAdapter.instantiateItem(FragmentStatePagerAdapter.java:120)	at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:1006)	at android.support.v4.view.ViewPager.populate(ViewPager.java:1154)	at android.support.v4.view.ViewPager.populate(ViewPager.java:1088)	at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1614)