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

Question

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;            默认:            //其他处理            break;     }})export default TodoDispatcher;