Status Hukum Perjanjian Pengikatan Jual Beli (PPJB) yang belum Ditandatangani Akta Jual Beli oleh Notaris Dalam Harta Pailit (Studi Putusan Mahkamah Agung Nomor 749K/PDT.SUS-PAILIT/2019) = Unsigned Sale and Purchase Deed by a Notary in Bankrupt Assets Legal Status of the Sale and Purchase Binding Agreement (Study of Supreme Court Decesion Number 749K/PDT.SUS-PAILIT/2019 Abstract