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/@serprex/react-motion/lib/mapToZero.js

@@ -0,0 +1,17 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = mapToZero;
+
+// currently used to initiate the velocity style object to 0
+function mapToZero(obj) {
+  var ret = {};
+
+  for (var key in obj) {
+    if (Object.prototype.hasOwnProperty.call(obj, key)) {
+      ret[key] = 0;
+    }
+  }
+
+  return ret;
+}