public void METHOD_1 ( TYPE_1 VAR_1 ) throws java.lang.Exception { if ( ! ( VAR_2 . contains ( VAR_1 ) ) ) throw new java.lang.Exception ( STRING_1 ) ; VAR_2 . add ( VAR_1 ) ; } 

public void METHOD_1 ( TYPE_1 VAR_1 ) throws java.lang.Exception { if ( ! ( VAR_2 . contains ( VAR_1 ) ) ) throw new java.lang.Exception ( STRING_1 ) ; VAR_2 . remove ( VAR_1 ) ; } 
