public TYPE_1 METHOD_1 ( TYPE_2 VAR_1 ) { <BUG> if ( ! ( VAR_2 . METHOD_2 ( VAR_1 . getId ( ) ) ) ) {VAR_2 . add ( VAR_1 . getId ( ) ) ;}return this ;</BUG> }
public TYPE_1 METHOD_1 ( TYPE_2 VAR_1 ) { return METHOD_1 ( VAR_1 . getId ( ) , 1 ) ; } 
