How to use relationsDepth with findById

How to use relationsDepth with findById:
var query = new Backendless.DataQuery();
query.options = {relationsDepth:2};
var resultCollection = Backendless.Persistence.of( Foo ).find( query );

var surveyData = Backendless.Persistence.of(Survey).findById(surveyId);

Hi, Sumanta.
Yes, you can. Probably in our documentation this not described.
Method “findById” is overloaded and if the type of one of parameters is “number”, it will be relationDepth.