// Efficient single-entry implementation
final Entry<K, V> e = map.entrySet().iterator().next();
return SharedSingletonMap.unorderedOf(e.getKey(), e.getValue());
// Efficient single-entry implementation
final Entry<K, V> e = map.entrySet().iterator().next();
return SharedSingletonMap.unorderedOf(e.getKey(), e.getValue());