code: protected MongodbQueueFactory<T, ID, DATA> setDefaultMongoClient(MongoClient mongoClient,
              boolean setMyOwnMongoClient) {
          if (myOwnMongoClient && this.defaultMongoClient != null) {
              this.defaultMongoClient.close();
          }
          this.defaultMongoClient = mongoClient;
          myOwnMongoClient = setMyOwnMongoClient;
          return this;
      }
docs: Setter for {@link #defaultMongoClient}.
  
  @param mongoClient
  @param setMyOwnMongoClient
  @return