优化:通道同步任务 增加：根据用户统计未读总数

liusuyi

2024-07-23 811b14aa5cd2bd6d4313b43dc38ce87cd938f3b0

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export function isPromise(maybePromise) {
    return (!!maybePromise &&
        !!maybePromise.then &&
        typeof maybePromise.then === 'function');
}