public boolean METHOD_1 ( TYPE_1 listener ) { boolean result = false ; if ( listener != null ) { try { VAR_1 . METHOD_2 ( ) ; if ( VAR_2 . contains ( listener ) ) { return false ; } else { result = VAR_2 . add ( listener ) ; } } finally { VAR_1 . METHOD_3 ( ) ; } } return result ; }

public boolean METHOD_1 ( TYPE_1 listener ) { boolean result = false ; try { VAR_1 . METHOD_2 ( ) ; if ( ( listener != null ) && ( ! ( VAR_2 . contains ( listener ) ) ) ) { result = VAR_2 . add ( listener ) ; } } finally { VAR_1 . METHOD_3 ( ) ; } return result ; }
