the panel stack is controlled by a group of radio buttons and their state changes call this method to register the newly selected panel . concode_field_sep String selectedFruit concode_elem_sep String selectedColor concode_elem_sep String selectedMineral concode_elem_sep String selectedPanel concode_field_sep void setSelectedFruit concode_elem_sep String getSelectedMineral concode_elem_sep String getSelectedFruit concode_elem_sep void setSelectedMineral concode_elem_sep String getSelectedPanel concode_elem_sep String getSelectedColor concode_elem_sep void setSelectedPanel concode_elem_sep void setSelectedColor
void function ( ValueChangeEvent arg0 ) { selectedPanel = arg0 . getNewValue ( ) . toString ( ) ; }