void function ( ) { obs . removeAllElements ( ) ; }
clears the observer list so that this object no longer has any observers . concode_field_sep Vector obs concode_elem_sep boolean changed concode_field_sep void addObserver concode_elem_sep boolean hasChanged concode_elem_sep void clearChanged concode_elem_sep void deleteObserver concode_elem_sep int countObservers concode_elem_sep void setChanged concode_elem_sep void notifyObservers concode_elem_sep void notifyObservers