/**
 * https://github.com/facebook/react-native/blob/master/Libraries/StyleSheet/StyleSheet.js
 */
const StyleSheet = {
  create(styles) {
    return styles;
  },
};

module.exports = StyleSheet;

@@ -156,16 +156,59 @@
 s;%0A  %7D,%0A
+  flatten(styles) %7B%0A    return styles;%0A  %7D%0A
 %7D;%0A%0Amodu

Add StyleSheet.flatten