Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/node_modules/@emotion/use-insertion-effect-with-fallbacks/dist/emotion-use-insertion-effect-with-fallbacks.browser.esm.js

@@ -0,0 +1,11 @@
+import * as React from 'react';
+
+var syncFallback = function syncFallback(create) {
+  return create();
+};
+
+var useInsertionEffect = React['useInsertion' + 'Effect'] ? React['useInsertion' + 'Effect'] : false;
+var useInsertionEffectAlwaysWithSyncFallback = useInsertionEffect || syncFallback;
+var useInsertionEffectWithLayoutFallback = useInsertionEffect || React.useLayoutEffect;
+
+export { useInsertionEffectAlwaysWithSyncFallback, useInsertionEffectWithLayoutFallback };