code: function(connection, options){
      if(!connection) throw "Data connection configuration undefined";
      options = options || {};
      this._options = lodash.defaults(options, {
          replication_strategy : {'class' : 'SimpleStrategy', 'replication_factor' : DEFAULT_REPLICATION_FACTOR }
      });
      this._models = {};
      this._keyspace = connection.keyspace;
      this._connection = connection;
      //Compatibility with old parameters name
      if(this._connection.hosts && !this._connection.contactPoints)
          this._connection.contactPoints = this._connection.hosts;
      this._client = null;
  }
docs: Utilità per cassandra
  @param {Apollo~Connection} connection configurazione di Apollo
  @param {Apollo~CassandraOptions} options - Cassandra options
  @class