Tinjauan yuridis terhadap perjanjian pengikatan jual beli dan perhimpunan penghuni rumah susun dengan konsep kondominium hotel : studi kasus Pullman Bali Legian Nirwana = Juridical review of condominium's preliminary sale of property agreement and resident's association with the concept of condominium hotel : case study Pullman Bali Legian Nirwana