如何使用帶有Redux減速器和lodash的JS Flow類型？

我可以鍵入我的動作，我的初始狀態和普通縮減器，但是當reducer返回一個包含lodash的狀態片段時，Flow似乎並未檢測到它：Flow：如何使用帶有Redux減速器和lodash的JS Flow類型？

setup：

// @flow 
import _ from 'lodash' 
import constants from './constants'; 

type initialStateType = { 
    authenticating: boolean, 
    authenticated: boolean, 
    goals: Array<?Object>, 
    user: Object 
} 

type genericAction = { 
    type: string, 
    goals?: Array<?Object>, 
    data?: Object | Array<mixed>, 
    user?: Object, 
    goalId?: ?number, 
    status?: boolean, 
} 

export const initialState: initialStateType = { 
    authenticating: false, 
    authenticated: false, 
    goals: [], 
    user: {}, 
};

減速的情況下，隨着流量的工作原理：

export function globalReducer(state: initialStateType = initialState, action: genericAction) { 
    switch (action.type) { 
    // Authentication 
    case constants.AUTHENTICATING: 
     return Object.assign({}, state, 
     { 
      authenticating: action.status, 
     } 
    ); 
... 
    case constants.USER_EDITED: 
    case constants.USER_FETCHED: 
     return Object.assign({}, state, 
     { 
      user: action.user, 
     } 
    );

減速的情況下，不與流動工作：

case constants.GOAL_CREATED: 
     return Object.assign({}, state, 
     { 
      goals: _.concat(state.goals, action.data), 
     } 
    ); 
... 
case constants.GOAL_DELETED: 
    return Object.assign({}, state, 
    { 
     goals: _.filter(state.goals, (value, index) => { 
     return value.id !== action.goalId; 
     }), 
    } 
);

使用Nuclide作爲我的文本編輯器，內置流程支持，流程強調了一行，'goals：_.concat（state.goals，action.data）'，帶有一條黃色消息，指出類型覆蓋率，不包括流。

如何使用lodash這些代碼行獲得正確的流覆蓋率？