src/main/java/com/googlecode/objectify/impl/EntityMetadata.java
public FullEntity<?> save(final P pojo, final SaveContext ctx) {
		try {
			return translator.save(pojo, false, ctx, Path.root()).get();
		}
		catch (SaveException ex) { throw ex; }
		catch (Exception ex) {
			throw new SaveException(pojo, ex);
		}
	}
public FullEntity<?> save(final P pojo, final SaveContext ctx) {
		try {
			return translator.save(pojo, false, ctx, Path.root()).get();
		}
		catch (SaveException ex) { throw ex; }
		catch (Exception ex) {
			throw new SaveException(pojo, ex);
		}
	}
Converts an object to a datastore Entity with the appropriate Key type.