def add_to_submission(self, submission_id, submission_objects):
        """Adds submission_objects to clinvar collection and update the coresponding submission object with their id

            Args:
                submission_id(str) : id of the submission to be updated
                submission_objects(tuple): a tuple of 2 elements coresponding to a list of variants and a list of case data objects to add to submission

            Returns:
                updated_submission(obj): an open clinvar submission object, updated
        """

        LOG.info("Adding new variants and case data to clinvar submission '%s'", submission_id)

        # Insert variant submission_objects into clinvar collection
        # Loop over the objects
        for var_obj in submission_objects[0]:
            try:
                result = self.clinvar_collection.insert_one(var_obj)
                self.clinvar_submission_collection.update_one({'_id':submission_id}, {'$push': { 'variant_data' : str(result.inserted_id) }}, upsert=True)
            except pymongo.errors.DuplicateKeyError:
                LOG.error("Attepted to insert a clinvar variant which is already in DB!")

        # Insert casedata submission_objects into clinvar collection
        if submission_objects[1]:
            # Loop over the objects
            for case_obj in submission_objects[1]:
                try:
                    result = self.clinvar_collection.insert_one(case_obj)
                    self.clinvar_submission_collection.update_one({'_id':submission_id}, {'$push': { 'case_data': str(result.inserted_id)}}, upsert=True)
                except pymongo.errors.DuplicateKeyError:
                    LOG.error("One or more casedata object is already present in clinvar collection!")

        updated_submission = self.clinvar_submission_collection.find_one_and_update( {'_id':submission_id}, { '$set' : {'updated_at': datetime.now()} }, return_document=pymongo.ReturnDocument.AFTER )
        return updated_submission
Adds submission_objects to clinvar collection and update the coresponding submission object with their id

            Args:
                submission_id(str) : id of the submission to be updated
                submission_objects(tuple): a tuple of 2 elements coresponding to a list of variants and a list of case data objects to add to submission

            Returns:
                updated_submission(obj): an open clinvar submission object, updated