}
}
-fun isIdentity(id: String, nickname: String, requestUri: String, contexts: Matcher<out Iterable<String>>, properties: Matcher<out Map<out String, String>>) =
+fun isIdentity(id: String, nickname: String?, requestUri: String, contexts: Matcher<out Iterable<String>>, properties: Matcher<out Map<out String, String>>) =
AttributeMatcher<Identity>("identity")
.addAttribute("id", id, Identity::getId)
.addAttribute("nickname", nickname, Identity::getNickname)