Perlindungan hukum terhadap pekerja/buruh yang mengalami kecelakaan kerja dan tidak didaftarkan jaminan sosial di perusahaan (studi kasus putusan Mahkamah Agung Republik Indonesia (MA) Nomor 580K/Pdt.Sus-PHI/2017) = Legal protection for workers/laborers who experience work accident and are not registered in the social security by the company (case study of the Decision of the Supreme Court of the Republic of Indonesia Number 580K/Pdt.Sus-PHI/2017)