question: protected Set < String > rabbitIdSet ( ) { Set < String > rabbitIdSet = new HashSet < > ( ) ; for ( Rabbit rabbit : rabbitCache . getRabbits ( ) ) { if ( ! rabbit . getHideOnConsole ( ) ) { rabbitIdSet . add ( rabbit . getId ( ) ) ; } } return rabbitIdSet ; }
target:  RabbitId Set Checking is checked option hide on console