} else if (operation < 4) {
map.containsKey(key);
stats.increment("containsKey");
} else if (operation < 5) {
Object value = String.valueOf(key);
map.containsValue(value);
stats.increment("containsValue");
} else if (operation < 6) {
map.putIfAbsent(key, createValue());
stats.increment("putIfAbsent");
} else if (operation < 7) {