I have learned about the new suitcase corners for sheet metal parts in 2018 Solidworks.  I have been wondering, how would these actually be made in reality?  So I searched around for how suitcase corners are made in sheet metal and I got nothing besides hits for Solidworks.  So do suitcase corners even exist or are they just a fiction invented by Solidworks?  If they do exist in the industry, how are they made exactly?