“…Another context in which universal objects have arisen is the study of Polish groups and, more generally, Polish spaces, see e.g., (Uspenskii, 1986;Ben-Yaacov, 2014). There has been considerable interest in the question of existence of universal objects among Banach spaces, and more generally, metric and topological spaces of a particular form, e.g., (Bourgain, 1980;Katětov, 1988;Bell, 2000;Džamonja, 2006;Brech and Koszmider, 2012;Brech and Koszmider, 2013;Džamonja, 2014). Finally, universal objects appear also in the context of sofic groups, see e.g., (Pestov, 2008;Thomas, 2010).…”