Tindak pidana penyimpanan dokumen objek perjanjian pengikatan jual beli terhadap notaris dalam menjalankan jabatannya : studi kasus Putusan Pengadilan Negeri Bukittinggi Nomor 53/Pid.B/2017.PNBkt = The crime of storing documents as the object of sales and purchase agreement against notary in performing their competence : case study of Bukittinggi District Court Decision Number 53/Pid.B/2017.PNBkt