Function restoreOne

Android/MMKV/mmkv/src/main/cpp/flutter-bridge.cpp:601–609

}

MMKV_EXPORT bool restoreOne(const char *mmapID, const char *srcDir, const char *rootPath) {
    if (rootPath) {
        auto root = string(rootPath);
        if (root.length() > 0) {
            return MMKV::restoreOneFromDirectory(mmapID, srcDir, &root);
        }
    }
    return MMKV::restoreOneFromDirectory(mmapID, srcDir);
}

MMKV_EXPORT uint64_t backupAll(const char *dstDir/*, const char *rootPath*/) {
    // historically Android mistakenly use mmapKey as mmapID