code: function (connectionName, collectionName, obj, cb) {
          if (_.isObject(obj)) {
              try {
                  var modelInstance = new this._model(obj);
                  return cb(null, modelInstance);
              }
              catch (err) {
                  return cb(err, null);
              }
          }
      }
docs: This allows one to create a model instance.
  
  @param {string} connectionName
  @param {string} collectionName
  @param {Object} obj
  @param {Function} cb
  @returns {Object} Model Instance