在TodoDispatcher.js中，会爆TypeError: TodoDispatcher.regeist is not a function错误，怎么解决呢

import {Dispatcher} from 'flux';//引用storeimport Store from '../stores/TodoStore';const TodoDispatcher=new Dispatcher();TodoDispatcher.regeist(function(action){    switch (action.actionType) {        case "ADD_TODO":            Store.addTodoData(action.payload);            Store.emitChange();            //调用store            break;            default:            //其他处理            break;    }})export default TodoDispatcher;