public boolean METHOD_1 ( TYPE_1 VAR_1 ) { this . VAR_2 . remove ( VAR_1 ) ; if ( ! ( VAR_1 . METHOD_2 ( ) . contains ( this ) ) ) { VAR_1 . METHOD_3 ( this ) ; } return true ; } 

public boolean METHOD_1 ( TYPE_1 VAR_1 ) { this . VAR_2 . add ( VAR_1 ) ; if ( ! ( VAR_1 . METHOD_2 ( ) . contains ( this ) ) ) { VAR_1 . METHOD_3 ( this ) ; } return true ; } 
