The following public/protected methods are unused on DBCollection, and therefore probably require test coverage:

• WriteResult updateMulti(final DBObject query, final DBObject update)
• long getCount(final ReadPreference readPreference)
• List distinct(final String fieldName, final DBObject query)
• AggregationOutput aggregate(final DBObject firstOp, final DBObject... additionalOps)
• void setHintFields(final List<DBObject> indexes)
• DBObject findAndModify(final DBObject query, final DBObject sort, final DBObject update)
• void resetOptions()
• protected Class<? extends DBObject> getInternalClass(final String path)