public void METHOD_1 ( TYPE_1 VAR_1 ) { if ( VAR_1 != null ) { this . VAR_2 . add ( VAR_1 ) ; } } 

public void METHOD_1 ( TYPE_1 VAR_1 ) { if ( ( ! ( this . equals ( VAR_1 ) ) ) && ( ! ( this . VAR_2 . contains ( VAR_1 ) ) ) ) { this . VAR_2 . add ( VAR_1 ) ; } } 
