src/main/java/com/googlecode/objectify/Key.java
public static <V> Key<V> key(final com.google.cloud.datastore.Key raw) {
		if (raw == null)
			return null;
		else
			return new Key<>(raw);
	}
public static <V> Key<V> key(final com.google.cloud.datastore.Key raw) {
		if (raw == null)
			return null;
		else
			return new Key<>(raw);
	}
Easy null-safe conversion of the raw key.