Query in collection with DBRef

[hellowrakesh123]

I have 2 entities as following:

@Document
public class Freelancer {
 @Id
 String id;
 String name;
 @DbRef
 List<Project> bidProjects;
}

@Document
public class Project {
 @Id
 String id;
 String name;
}

Project can't have the ref to freelancer as there could be many freelancers who can bid the projects. I want do following:

Find the freelancer who has placed a bid on project with name = "XYZ".

What should be the query for this, i tried following (other combinations but nothing works):
@Query("{ 'completedProject': {'$ref': 'project', 'name': ?0 } }")
@Query("{ 'completedProjects': {'$ref': 'project', 'name': ?0 } }")
@Query("{ 'completedProject': [{'$ref': 'project', 'name': ?0 }] }")