!7 set flag structure_debug. sclass Blubb { S a = "aa", b = "bb"; transient Map _persistenceInfo = litmap("a", false); } p-exp { assertEqualsVerbose([[Blubb(b="bb")]], structure(new Blubb)); assertEqualsVerbose([[Blubb(a="aa", b="bb")]], structure(nu(Blubb, _persistenceInfo := null))); assertEqualsVerbose([[Blubb(a="aa", b="bb")]], structure(nu(Blubb, _persistenceInfo := litmap("a", true)))); }