example/dist/bundle.js
function toArray(children) {
  var result = [];
  mapIntoWithKeyPrefixInternal(children, result, null, function (child) {
    return child;
  });
  return result;
}
function toArray(children) {
  var result = [];
  mapIntoWithKeyPrefixInternal(children, result, null, function (child) {
    return child;
  });
  return result;
}
Flatten a children object (typically specified as `props.children`) and
return an array with appropriately re-keyed children.

See https://reactjs.org/docs/react-api.html#reactchildrentoarray