code: function instance_getters () {
          var _parseArguments = parseArguments$1(arguments),
              getters = _parseArguments.getters,
              options = _parseArguments.options;
  
          return Object.keys(getters).reduce(function (instanceGetters, name) {
              instanceGetters[name] = function (state, otherGetters) {
                  return function (instanceKey) {
                      var instance = state[options.stateKey || 'instances'].find(function (obj) {
                          return obj[options.instanceKey || 'id'] === instanceKey;
                      });
  
                      if (instance) {
                          return getters[name](instance, otherGetters, state, instanceKey);
                      }
                  };
              };
  
              return instanceGetters;
          }, {});
      }
docs: Instance getters.
  
  @return {Object}