code: function(cb) {
  
              var collection = connectionObject.collections[collectionName];
              if (!collection) return cb(Errors.CollectionNotRegistered);
  
              collection.dropTable(function(err) {
                // ignore "table does not exist" error
                if (err && err.code === 8704) return cb();
                if (err) return cb(err);
                cb();
              });
            }
docs: drop the main table