Legal standing investor dalam mengajukan gugatan: studi kasus putusan Mahkamah Agung Republik Indonesia No. 1455k/pdt/2017 tentang obligasi PT Bank Global Internasional, Tbk. = Legal standing investor in submitting a claim: case study of decision of the Supreme Court of the Republic of Indonesia No. 1455k/pdt/2017 concerning bonds of PT Bank Global Internasional, Tbk.