let
attr = {"key 1"="test";"key 2"="caseok";};
t1 = builtins.getAttr "key 1" attr;
t2 = attr."key 2";
t3 = attr ?"key 1";
t4 = builtins.attrNames {inherit(attr)"key 1"; };# This is permitted, but there is currently no way to reference this# variable."foo bar"=1;in t1 =="test"&& t2 =="caseok"&& t3 ==true&& t4 == ["key 1"]