code: public RemoteUpdateResult updateOne(final Bson filter, final Bson update) {
      return proxy.updateOne(filter, update);
    }
docs: Update a single document in the collection according to the specified arguments.
  
  @param filter a document describing the query filter, which may not be null.
  @param update a document describing the update, which may not be null. The update to apply
  must include only update operators.
  @return the result of the update one operation