Studi perilaku stereotipe kukang jawa (Nycticebus javanicus Geoffroy, 1812) di kandang pusat rehabilitasi satwa international animal rescue (IAR), Bogor = Stereoptyc behavioral study on captive Javan Slow Loris (Nyticebus javanicus Geoffroy, 1812) in animal rehabilitation center of International Animal Rescue (IAR), Bogor