I have the following data structure

```
{
  metadata: {
    a: 0,
    b: 4,
    c: 1,
    d: 6
  }
}

```

I want to find a simple way to add all the variables in the metadata together without having to do them one at a time.. like metadata.a + metadata.b + metadata.c + metadata.d

I am hoping for a way to just add whatever variable exists in that

Any suggestions?