Pelaksanaan eksekusi objek jaminan fidusia sebelum dan sesudah dikeluarkannya putusan Mahkamah Konstitusi nomor 18/PUU-XVII/2019 (Studi kasus pelaksanaan praktek jaminan fidusia di Bank BNI Syariah) = Execution of fiduciary security objects before and after the issuance of the constitutional court decision number 18/PUU-XVII/2019 (Case study of the implementation of fiduciary security practices at Bank BNI Syariah)