public void METHOD_1 ( TYPE_1 VAR_1 ) { if ( ( this . VAR_1 ) != null ) { this . VAR_1 . METHOD_2 ( ) ; } this . VAR_1 = VAR_1 ; } 

public void METHOD_1 ( TYPE_1 VAR_1 ) { if ( ( this . VAR_1 ) != null ) { this . VAR_1 . METHOD_2 ( ) ; this . VAR_1 = null ; } this . VAR_1 = VAR_1 ; } 
