code: MongoCollection<BsonDocument> getLocalCollection(final MongoNamespace namespace) {
      return getLocalCollection(
          namespace,
          BsonDocument.class,
          MongoClientSettings.getDefaultCodecRegistry());
    }
docs: Returns the local collection representing the given namespace for raw document operations.
  
  @param namespace the namespace referring to the local collection.
  @return the local collection representing the given namespace for raw document operations.