public void METHOD_1 ( TYPE_1 VAR_1 ) { VAR_2 . METHOD_2 ( ) . add ( VAR_1 ) ; } 

public void METHOD_1 ( TYPE_1 VAR_1 ) { if ( ! ( VAR_2 . METHOD_2 ( ) . contains ( VAR_1 ) ) ) { VAR_2 . METHOD_2 ( ) . add ( VAR_1 ) ; } } 
