question: checks to see if back navigation is possible . concode_field_sep Destination selectedDestination concode_elem_sep ExampleImpl selectedExample concode_elem_sep Destination DESTINATION_SPLASH concode_elem_sep Destination DESTINATION_MENU concode_elem_sep Stack<String> history concode_elem_sep String selectedPanel concode_elem_sep String BEAN_NAME concode_field_sep String goToHome concode_elem_sep Destination getSelectedDestination concode_elem_sep String goBack concode_elem_sep ExampleImpl getSelectedExample concode_elem_sep String goToMenu concode_elem_sep String getSelectedPanel concode_elem_sep void scrollToTopOfPage concode_elem_sep String navigateTo concode_elem_sep void setSelectedPanel concode_elem_sep String navigateToParam
target: boolean function ( ) { return ! history . isEmpty ( ) ; }