src/main/java/com/googlecode/objectify/impl/Keys.java
public static com.google.cloud.datastore.Key raw(final Key<?> key) {
		return key == null ? null : key.getRaw();
	}
public static com.google.cloud.datastore.Key raw(final Key<?> key) {
		return key == null ? null : key.getRaw();
	}
Null-safe extraction of the raw key