in src/main/java/org/apache/sling/testing/junit/rules/instance/AbstractInstance.java [129:139]
public <T extends SlingClient> T getClient(Class<T> clientClass, String user, String pass) {
if (clientsCache.containsKey(user + pass)) {
try {
return clientsCache.get(user + pass).adaptTo(clientClass);
} catch (ClientException e) {
return null;
}
} else {
return newClient(clientClass, user, pass);
}
}