sets the new value and notifes all listeners . concode_field_sep List<VRObserver> observers concode_elem_sep T value concode_field_sep void onChange concode_elem_sep T get concode_elem_sep boolean isPresent concode_elem_sep void removeListener concode_elem_sep void addListener
void function ( final T arg0 ) { onChange ( this . value , this . value = arg0 ) ; }