code: function getHandler(app, schema, data) {
      function handleSave(err, results, next) {
          if (!err) {
              delete DependenciesMap[schema];
              SavedSchemas.push(schema);
              _l('schema saved: ' + schema);
          }
          next(err, results);
      }
  
      // Default handler function
      var ret = function (next) {
          data = _.isObject(data) ? _.values(data) : data;
          DBActions.getSimpleInstance(app, schema).multipleSave(data, function (err, results) {
              handleSave(err, results, next);
          });
      };
  
      // Data handler provided in plugin
      var ret1 = SchemaDataHandler[schema] && function (next) {
          SchemaDataHandler[schema](app, data)(function (err, results) {
              handleSave(err, results, next);
          });
      };
      return ret1 || ret;
  }
docs: Returns data handler if provided with plugin otherwise return default handler function
  @param app
  @param schema {String} Schema name
  @param data {Object|Array} default data
  @returns {*|Function|Function}