I want result with distinct value of one field from mongodb using spring data

I want result with distinct value of one field from mongodb using spring data. My code is

Query query = new Query();

    query.addCriteria(Criteria.where("to.toId").in(toIdList));
    query.fields().include("from");
    query.fields().include("fromName");
    query.fields().include("sentTime");
    query.fields().include("hasAttachment");
    newMessages = mongoTemplate.find(query, NewMessage.class);