react-native Picker组件似乎不提供multiselect选项https://facebook.github.io/react-native/docs/picker.html#enabled
但是，我有一些提供multiselect选项的库，如
https://github.com/toystars/react-native-multiple-select
https://www.npmjs.com/package/react-native-multiple-select-list
但有没有办法选择多个值而不需要包？